A set consists of a sequence of games played with service alternating between games, ending when the count of games won meets certain criteria. Typically, a player wins a set by winning at least six games and at least two games more than the opponent. If one player has won six games and the opponent five, an additional game is played. If the leading player wins that game, the player wins the set 7–5. If the trailing player wins the game (tying the set 6–6) a tie-break is played. A tie-break, played under a separate set of rules, allows one player to win one more game and thus the set, to give a final set score of 7–6. A "love" set means that the loser of the set won zero games, colloquially termed a 'jam donut' in the USA.[55] In tournament play, the chair umpire announces the winner of the set and the overall score. The final score in sets is always read with the winning player's score first, e.g. "6–2, 4–6, 6–0, 7–5".
Help: Flash Score tennis live scores offer live tennis scores for over 2000 ATP, WTA and Challenger tournaments, providing also WTA and ATP rankings, ATP Race to London standings, final tennis results and tournament draws - all draw tabs are being updated within minutes after a live-followed tennis match has ended. With a single click away you can see who plays whom and in what round. Tennis livescore updates live, you don't need to refresh the livescore page. Follow all (not only major tournaments like Australian Open, French Open, Wimbledon and US Open) ATP/WTA tournaments live!
Very simply, find yourself a certified and reputable teaching professional (“pro”) and take a handful or dozen lessons over the course of a few weeks to jump-start the learning process and help you retain and apply the instructors teachings. Don’t be surprised or alarmed if the pro has you doing some things that feel awkward, or asks you to change the way you’ve been doing things before. He or she may have you doing certain exercises or “drills” that are designed to develop specific skills that, to you, may seem impractical or odd, but which actually work. Be patient, be alert, be attentive, Listen and apply as much as you can. Finally, come prepared to each lesson by having practiced at least once or twice since the previous lesson, and bring water and a towel, sunglasses, sunscreen and a cap to prevent sunburn and heat exhaustion.
As it happens, I was reading a ruefully captivating new memoir called “Swimming Studies,” by a onetime contender for the Canadian Olympic team, Leanne Shapton, which explores how growing up a competitive swimmer formed her habits of heart and mind. Years later, her daily rhythms and life choices, her nightly dreams, her understanding of duration, pleasure, pain and reward, remain informed by her hours in the training pool. Swimming strokes carved the contours of her inner life, and it’s not at all clear she is thankful for that. Of course, Andre Agassi, in his memoir, writes of how the aloneness of singles tennis — the very thing that imparted to Kirill a kind of Emersonian self-reliance, as he understands it — just enlarged his loneliness. You never know.
Both color coatings and cushioned surfacing systems come in an array of colors, allowing you to branch out from the traditional green court surface and use nearly any color or combination of colors you choose on your backyard tennis court. While there is no "regulation" color scheme for tennis courts, some colors work better under certain conditions.
Tennis is played on a rectangular, flat surface. The court is 78 feet (23.77 m) long, and 27 feet (8.2 m) wide for singles matches and 36 ft (11 m) for doubles matches.[48] Additional clear space around the court is required in order for players to reach overrun balls. A net is stretched across the full width of the court, parallel with the baselines, dividing it into two equal ends. It is held up by either a metal cable or cord that can be no more than 0.8 cm (1⁄3 in).[49] The net is 3 feet 6 inches (1.07 m) high at the posts and 3 feet (0.91 m) high in the center.[48] The net posts are 3 feet (0.91 m) outside the doubles court on each side or, for a singles net, 3 feet (0.91 m) outside the singles court on each side.
These Terms of Use are effective until terminated by either party. Your access to any and all USTA Family of Companies sites may be terminated immediately without notice from us if, in our sole discretion, you fail to comply with any term of these Terms of Use. Upon such termination, you must cease use of the USTA Family of Companies site and destroy all materials obtained from such site and all copies thereof, whether made under the terms of these Terms of Use or otherwise. You may terminate at any time by discontinuing use of all USTA Family of Companies sites. Upon such termination, you must destroy all materials obtained from any and all such sites and all related documentation and all copies and installations thereof, whether made under the terms of this Terms of Use or otherwise.
Help: Scoreboard offers live tennis scores for all major ATP, WTA, Challanger and ITF tournaments together with tennis grandslams. Get ATP, WTA tennis tournament brackets, set results and match details. Follow the entire tennis season live on Scoreboard – from Hopman Cup live scores, Australian Open and Wimbledon to US Open scores, ATP Masters and WTA Championships. Scoreboard.com tennis section offers real-time WTA and ATP scores live, latest ATP results, Fed Cup and Davis Cup live tennis scores.
In August 2007 the ATP announced major changes to the tour that were introduced in 2009. The Masters Series was renamed to the "Masters 1000", the addition of the number 1000 referring to the number of ranking points earned by the winner of each tournament. Contrary to earlier plans, the number of tournaments was not reduced from nine to eight and the Monte Carlo Masters remains part of the series although, unlike the other events, it does not have a mandatory player commitment. The Hamburg Masters has been downgraded to a 500-point event. The Madrid Masters moved to May and onto clay courts, and a new tournament in Shanghai took over Madrid's former indoor October slot. As of 2011 six of the nine "1000" level tournaments are combined ATP and WTA events.[89]
Louisiana State University in Shreveport is a public tennis establishment located at 81 University Pl, Shreveport, LA 71115. There are 8 public tennis courts at this tennis facility. The tennis courts are not lighted. You can call this tennis location at 318-797-5061. Get listed now at this tennis facility to participate with other tennis friends. Check out the Automatic Player Matching Service - Tennis Round will connect you with other tennis players automatically based on your skill level and match history. Earn points for playing and move up in the rankings.
It was a thought — being a tennis player — that first came to me five years ago when I was months from my 55th birthday. It wasn’t that I imagined I was going to become an athlete. I am a tennis fan, and I turn on ESPN and attend the United States Open each year with the understanding that the men and women I love to watch are, as they were not when I was a boy, a breed apart: selection for size and intense training and competition from early childhood is increasingly creating a sort of warrior class in sports. I wanted to become a very good recreational player. Someday.
Lorde performed "Tennis Court" at the 2014 Billboard Music Awards in May.[81] The following month, she performed a medley of "Tennis Court" and "Team" at the 2014 MuchMusic Video Awards.[82] Lorde also performed the song during several music festivals, including the Coachella Valley Music and Arts Festival in Indio, California,[83] the Laneway Festival in Sydney,[84] Lollapalooza Brazil in Sao Paulo.[85] At the Lollapalooza Festival in Grant Park, Chicago on 1 August 2014, she performed the track among other songs from Pure Heroine. Billboard picked Lorde's performance as the fifth best of the festival.[86] Rolling Stone deemed her set list the highlight of the event, writing that "She danced like she was trying to fling her arms off her body, but just as with her voice, the sense that she was in absolute possession of her abilities never waned. She nailed every stomp and every note — but it was clearly fueled by passion, not perfection".[87]
A tie-break set is played with the same rules as the advantage set, except that when the score is tied at 6–6, a tie-break game (or tiebreaker) is played. Typically, the tie-break game continues until one side has won seven points with a margin of two or more points. However, many tie-break games are played with different tiebreak point requirements, such as 8 or 10 points. Often, a 7-point tie-breaker is played when the set score is tied at 6–6 to determine who wins the set. If the tiebreak score gets to 6-6, then whichever player to win the best of two points wins the set. [19]

Post-tensioned concrete is reinforced with a grid of high-strength sheathed steel tendons, or cables. While the concrete is curing, the cables are tensioned in both directions and held permanently under stress by anchoring them in a perimeter beam. This squeezing action keeps the concrete in compression, improving its tensile (or bending) strength. The more the concrete is squeezed together, the less likely it is that shrinkage cracks will develop or open. (See a more complete description of post-tensioning from the Post-Tensioning Institute.)
Hi, my name is Jamie. I have been teaching tennis for about 14 years and have a love and passion for teaching tennis to anyone who is wanting to learn and improve their game. I have been working at Punahou School for the last 12 years and have done group, private, and cardio tennis lessons there and have a good foundation of how to build lessons and skills within my students through effective progressions that have worked to build state ranked juniors. I am USPTA Certified and Cardio Certified. Please let me know how I can help you to work on technique and strategy through a game based learning approach. ... View Profile
For length, 21 to 26 inches (53 to 66 cm) is normally the junior racket range, while 27 inches (69 cm) is for stronger more physically-mature players. Some are also available at lengths of 27.5 to 29 inches (70 to 74 cm). The Gamma Big Bubba was produced with a 32 inches (81 cm) length but it is no longer legal in that length. Gamma responded by changing the length of the grip portion of the racket, to continue sales. The length restriction was based on the concern that such long rackets would make the serve too dominant, but that concern has never been objectively supported with testing. Moreover, some players, such as John Isner, are much taller and have longer arms than average professionals (and especially low stature ones), giving them a much larger advantage in terms of height for the service than is possible with several inches of racket length. This makes the length restriction more questionable. Finally, the professionals who nearly always choose to use the longest rackets typically choose them because they use two-handed groundstrokes for both forehand and backhand, using the extra length to improve their reach. An example is Marion Bartoli. As this type of player is not dominant in the sport, or even close to being average in terms of per capita representation, the length restriction seems even more unnecessary. Despite Prince's attempt to market longer length "longbody" rackets in the 1990s, standard length remains the overwhelming choice of players, further negating the argument in favor of the length restriction. When most players who choose to use a longer racket than 27 inches (69 cm) choose one, they typically only use a 27.5 inches (70 cm) model, rather than one approaching 30 inches (76 cm). Longer rackets were introduced by Dunlop[10]
Are you planning to learn tennis? Tennis is such an exciting game that not only strengthens your body, but sharpens your mind and reflexes as well. So it is no surprise to me if you are planning to learn tennis. Learning the game is not difficult for a number of reasons that will be explained in the article later, but be warned that to become a master in this game requires a lot of practice, hard work and dedication. Andre Agassi, famous tennis player has said, “Nothing can substitute for just plain hard work.” In short, if you don’t have the passion or dedication to learn tennis then you will never be able to master the game like a pro!
This is a pretty serious level of tennis. The NCAA colleges have a very high skill ceiling for their tennis programs. They are looking for players who preferably have an ITF ranking and pretty proficient at their craft. To achieve this level of tennis you have to get your child in training from a very young age, like at 7-9 years old. They should have a dedicated plan for what they are going to do in their formative years because you have to maintain a balance of study and great tennis to get accepted into NCAA colleges on a sports scholarship. If your kid shows the talent then they can learn all the fundamentals in less than two years and they can keep practicing to perfect them.

Position yourself in a baseline corner. The game starts with both players on the baseline. The server chooses a corner of the baseline to serve from, and the other player positions themselves on the opposite back corner. So if you serve from the right corner of your side of the court, your opponent will stand in the far left corner from your point of view.[12]
Explanations: Tennis livescore service on Livescore.in provides bettors and tennis fans with livescore real-time score service for all ATP and WTA events. Livescore tennis lets you stay updated and be in the games with its ultimate tennis live scores service! Get notified about live tennis scores changes by sound or coloured alerts, or just select your favourite tennis games in the Selected section. Webmasters of sports related websites who are interested in the tennis livescore service designed to match their site layout are welcome to utilize our livescore solution called inScore.
Tennis is a wonderful sport. It is a great exercise for both the mind and the body and sometimes critics say that it is all a mind sport. Unlike many other sports, all the responsibility to perform well is on you. If you are not in the right mindset you probably will not get very far. While I do agree with this statement, a great athletic body definitely helps more often than not. Players like Rafael Nadal have used their extremely well-built bodies to become legends, they work on their bodies as much as they work on their minds. 
It’s also important to consider the size and shape of the racquet head. Oversized and mid-plus sized heads have larger sweet spots, making it easier to hit the ball with power, while smaller head sizes allow for greater control. Tear-drop shaped heads also provide a larger sweet spot, while traditional oval heads are valued for their feel and control.
The four Grand Slam tournaments are considered to be the most prestigious tennis events in the world. They are held annually and comprise, in chronological order, the Australian Open, the French Open, Wimbledon, and the US Open. Apart from the Olympic Games, Davis Cup, Fed Cup, and Hopman Cup, they are the only tournaments regulated by the International Tennis Federation (ITF).[82] The ITF's national associations, Tennis Australia (Australian Open), the Fédération Française de Tennis (French Open), the Lawn Tennis Association (Wimbledon) and the United States Tennis Association (US Open) are delegated the responsibility to organize these events.[82]
Picking a good one usually depends on your play style. Heavier rackets are slower, but give you more power. Lighter rackets offer maneuverability, but you won’t be able to hit a grand slam. Smaller racket heads concentrate power while larger ones help newer players get a hold of the ball. If you play at the net, you need something light, fast, and large, while baseliners need heavier rackets that give them power and help them drop spin on the ball. You must find the right mix of power and precision to suit your personality. To help you, here is our 7 best tennis rackets.
One thing all test players could quickly agree on: The Burn FST 99 can be swung very fast. With all shots the club could be swung and maneuvered extremely fast. This way, we always got the club into the optimum stroke position, even with fast rallies. The comfort is also surprisingly high, considering that the racquet with a frame hardness of 72RA is actually rather hard. The relatively thin frame of the racquet made it possible for the racquet to give way in exactly the right places and thus to cushion the impact well when hitting the ball.
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Moving, always moving, and all the time thinking and checking off: Maintain the continental grip, the base knuckle of the index finger of my left hand resting on the bevel one notch counterclockwise from the racket handle’s high noon. (Check.) Keep the racket in front and the racket head up. (Check.) Knees slightly bent. (Check.) Turn sideways quickly, and punch with your shoulder, don’t swing; and tighten your grip at the moment the ball is about to hit the strings.
When both sides have won the same number of points then: when each side has won one, or two, points, the score is described as "15-all" and "30-all" (or "15-up" and "30-up"), respectively. However, if each player has won three points, the score is called as "deuce", not "40–all". From that point on in the game, whenever the score is tied, it is described as "deuce", regardless of how many points have been played.

OK. Now that you understand the court, let’s learn to play tennis with some specifics. As already mentioned, a tennis beginner can play a singles or doubles game with either one or two players on each side of the net. The game — and, each point — begins with a serve taken from behind the baseline. The ball must bounce into the diagonally opposite service court. (Your serve may be your most difficult stroke as you learn to play tennis.) The play — or point — continues until one player fails to hit the ball back or hits it out-of-bounds.


The tiebreak is sometimes not employed for the final set of a match and an advantage set is used instead. Therefore, the deciding set must be played until one player or team has won two more games than the opponent. Of the major tennis championships, this now only applies in the French Open. In the US Open, a tiebreak is played in the deciding set (fifth set for the men, third set for the women) at 6–6. Starting in 2019, in Wimbledon, a tiebreak will be played if the score reaches 12–12 in the final set. In the Australian Open, a "first to 10" tiebreak is played in the deciding set if it reaches 6–6.[20][21] (When the tiebreak was first introduced at Wimbledon in 1971, it was invoked at 8–8 rather than 6–6.) The US Open formerly held "Super Saturday" where the two men's semi-finals were played along with the women's final on the second Saturday of the event; therefore a tie-break was more prudent where player rest and scheduling is more important.
As rackets have become lighter, stiffer, and larger-headed, the professional game has moved, basically completely, from softer and more flexible string materials to stiff materials. This is, in large part, to tone down the additional power potential of the "modern" rackets. However, it also is related to the tendency for different string materials to move out of place when subjected to heavy topspin strokes. Polyester is the string of choice today because of that resistance, despite its increased stiffness (harsher feel and more aggravating for the joints) and reduced tension-holding ability (versus a string like natural gut, which excels at that). The top professionals of the 1970s and earlier, despite having access to stiffer materials such as nylon, nearly always chose to use the very flexible natural gut instead. String bed stiffness can be increased by using stiffer materials, such as kevlar and polyester, by increasing the density of the string pattern, and by stringing with a higher tension. Racket makers and players have experimented with very dense string patterns and very "open" patterns, beginning with the Snauwaert Hi Ten, which had a pattern with as few as 12 mains and 13 crosses. Doubles great Mark Woodforde used one of them.[14] More recently, Grigor Dimitrov is known for having played with a very open-patterned racket during part of his career. String choice, both in thickness and material, string tension, string pattern, and string pattern density can have a very large effect on how a racket performs.
Vibration dampeners (also sometimes known as "gummies") may be interlaced in the proximal part of the string array, to reduce the percussive sound of the ball hitting the strings and/or to reduce perceived vibration. They do not, however, reduce impact shock significantly, so they are of no safety value.[13] Some professionals, such as Andrei Agassi, used rubber bands instead of specialized dampeners. Dampeners come in two main types. The first uses the two central main strings to hold it in place. The second is sometimes called a "worm" and it is woven between many of the main strings. Dampeners are nearly always placed very near the bottom of the racket string bed.
A tennis court is the venue where the sport of tennis is played. It is a firm rectangular surface with a low net stretched across the center. The same surface can be used to play both doubles and singles matches. A variety of surfaces can be used to create a tennis court, each with its own characteristics which affect the playing style of the game.
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Grass courts are the fastest type of courts in common use.[7] They consist of grass grown on very hard-packed soil, which adds additional variables: bounces depend on how healthy the grass is, how recently it has been mowed, and the wear and tear of recent play. Points are usually very quick where fast, low bounces keep rallies short, and the serve plays a more important role than on other surfaces. Grass courts tend to favour serve-and-volley tennis players.

Consider a player who wins six games in each of two sets, all by a score of game–30. The winner has scored 4×12 = 48 points and the loser 2×12 = 24. Suppose also that the loser wins four games in each set, all by a score of game-love. The loser has scored 4×8 = 32 points and the winner zero in those games. The final score is a win by 6–4, 6–4; total points 48–56.
Outside Australasia, the single achieved modest commercial success. It peaked at number 78 on the Canadian Hot 100 and remained for five weeks on the chart.[61] The track earned platinum certification from Music Canada, which denotes shipments of 80,000 copies in the country.[62] The single had the similar position on the UK Singles Chart and was certified silver by the British Phonographic Industry for track-equivalent sales of 200,000 units, based on sales and streams.[63][64] It also entered the top 100 of the German Singles Chart, where it reached number 83.[65] Despite not entering the record chart of Norway, the song was certified platinum by IFPI Norway for exceeding sales of 10,000 units in the country.[66] In the US, "Tennis Court" debuted at number 71, which was also its highest placement, on the Billboard Hot 100 chart dated 19 October 2013.[67] The single spent 18 weeks on the chart and had sold 355,000 copies in the US by April 2014.[68][18] It also reached number nine on the Hot Rock Songs, a Billboard auxiliary chart.[69]
Learn to play doubles tennis. Doubles tennis has two players on each side instead of one. You’ll use the wider court dimensions, but the rest of the scoring and rules remain the same. The big challenge for doubles tennis beginners is to learn how to interact with a teammate. Ask other tennis-playing friends to teach you the best strategies for doubles tennis.[23]
A frequent topic of discussion among tennis fans and commentators is who was the greatest male singles player of all time. By a large margin, an Associated Press poll in 1950 named Bill Tilden as the greatest player of the first half of the 20th century.[95] From 1920 to 1930, Tilden won singles titles at Wimbledon three times and the U.S. Championships seven times. In 1938, however, Donald Budge became the first person to win all four major singles titles during the same calendar year, the Grand Slam, and won six consecutive major titles in 1937 and 1938. Tilden called Budge "the finest player 365 days a year that ever lived."[96] In his 1979 autobiography, Jack Kramer said that, based on consistent play, Budge was the greatest player ever.[97] Some observers, however, also felt that Kramer deserved consideration for the title. Kramer was among the few who dominated amateur and professional tennis during the late 1940s and early 1950s. Tony Trabert has said that of the players he saw before the start of the open era, Kramer was the best male champion.[98]
He said there was no way he could ever have been a pro player, and that he knew that in his early teens — for one thing, there wasn’t the money to get him to tournaments beyond those near his home. He plays competitively now one night a week, which is all his schedule allows, hitting with guys his age who had played serious college tennis and, in some cases, joined the low rungs of the pro tour for a year or two.
Advantage sets sometimes continue much longer than tie-break sets. The 2010 Wimbledon first-round match between John Isner and Nicolas Mahut, which is the longest professional tennis match in history, notably ended with Isner winning the fifth set by 70–68. The match lasted in total 11 hours and five minutes, with the fifth set alone lasting eight hours, 11 minutes. Whoever wins by a margin of two wins the set, but this could take a very long time to finish.
I am a very well versed USPTA tennis pro. I provide tennis instruction at all levels and for all ages. Wether you are a beginner, intermediate, advance, recreatioinal, club or tournamnet player, I have the right lesson plan for you. I have taught tennis for over 25 years and taught a wide varierty of students. From public facilities and private clubs to high school and unniversities. Wether you are starting new, hit a plateu or simply want to improve your game, I will taylor your lesson plan specific to your needs. Classes can be given in either English or Spanish. ... View Profile

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During the 19th century the Royal Tennis Court played a variety of different roles. It served as a theatre storeroom, a workshop and storage space, and a studio for the painters Antoine-Jean Gros and then Horace Vernet. It was listed as a national monument in 1848, then became a games room again under the Second Empire. Approaching the centenary of the oath, under the Third Republic, architect Edmond Guillaume was invited to restore it and convert it into a museum of the French Revolution. The architect used original engravings to reconstitute the spirit of the room, which had been modified and had deteriorated over the course of the century. The museum housed the statue of Bailly, busts of the most important signatories of the oath, and a monumental canvas by Luc-Olivier Merson, based on Jacques-Louis David's preparatory drawing. The museum was inaugurated on 20 June 1883 in the presence of Jules Ferry.
Head size plays a very key role in a racket's performance characteristics. A larger head size very generally means more power and a larger "sweet spot". This is an area in the string bed that is partially more forgiving on off-center hits and which produces more ball-reflective power from string deformation, known as the trampoline effect. However, large head sizes can increase twisting, which makes off-center hits more difficult to control and can reduce a player's overall power production due to the playing compensating for the extra inherent power, typically with stiffer strings to reduce the increased string deformation of large heads. A smaller head size generally offers more control for many shots, particularly the service and groundstrokes aimed near the lines, but can lead to more shanks (wild misses, from hitting the frame or missing the sweet spot). This drawback is most common for professional players using single-handed topspin backhands, as well as for recreational and aged players at net. Shanking due to small racket head size is typically exacerbated by racket weight, which slows the reaction time, as well as, to a lesser degree, the racket's balance point. In professional tennis, currently-used racket head sizes vary between 95–115 square inches (610–740 cm2), with most players adopting one from 98–108 square inches (630–700 cm2). Rackets with smaller and larger head sizes, 85 and 120–137 square inches (550 and 770–880 cm2), are still produced but are not used by professionals currently. A very small number of professionals, such as Monica Seles, used 125 square inches (810 cm2) rackets during some point in their careers. Rackets with smaller heads than 85 square inches (550 cm2) have not been in production since the 1980s and rackets with larger head sizes than 137 square inches (880 cm2) are not currently legal for the sport, even though only elderly players typically choose to use rackets beyond 115 square inches (740 cm2) and it is nearly unheard-of for a serious player who is not elderly to choose a racket over 125 square inches (810 cm2). The WEED company, founded by Tad Weed, specializes in producing very large rackets, primarily for the elderly market. Rackets that are moderately higher in power production, moderately lower in weight, moderately larger in size, and which typically possess a slightly head-heavy balance are often called "tweener rackets."[11] Rackets that have the smallest heads in current use, the highest weights in current use, and headlight or even balance are referred to as "players' rackets". Oversize rackets, typically 110 square inches (710 cm2) in size, were once pejoratively referred to as "granny sticks" but resistance to them being seen as illegitimate rackets for younger players decreased dramatically with the successful use of these rackets by a small number professionals such as Andre Agassi and Pam Shriver. Originally, even midsize frames (85 square inches (550 cm2)) were considered jumbo, and some top players, such as Martina Navratilova and Rod Laver said they should be banned for making the sport too easy. Later, these same professionals, including John McEnroe, signed a letter supporting a switch back to wood frames, or a limitation to the original standard size of approximately 65 square inches (420 cm2). Perhaps the last professional to use a standard-size racket in professional tennis was Aaron Krickstein, known for the strongly-contested match against Connors at the 1991 US Open. He used a Wilson Ultra-II standard-size graphite racket also used in the 1980s by the hard-hitting teen Andrea Jaeger. The first oversize, the fiberglass Bentley Fortissimo from Germany, was praised by racket designers but was considered too large to be taken seriously by the small number of players who were exposed to it.
In most professional play and some amateur competition, there is an officiating head judge or chair umpire (usually referred to as the umpire), who sits in a raised chair to one side of the court. The umpire has absolute authority to make factual determinations. The umpire may be assisted by line judges, who determine whether the ball has landed within the required part of the court and who also call foot faults. There also may be a net judge who determines whether the ball has touched the net during service. The umpire has the right to overrule a line judge or a net judge if the umpire is sure that a clear mistake has been made.[59]
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