The origin of the use of "love" for zero is also disputed. The most likely explanation is that it derives from the French expression for "the egg" (l'œuf) because an egg looks like the number zero.[8][9] This is similar to the origin of the term "duck" in cricket, supposedly from "duck's egg", referring to a batsman who has been called out without scoring a run. One possibility comes from the Dutch expression iets voor lof doen, which means to do something for praise, implying no monetary stakes.[10] Another theory on the origins of the use of "love" comes from the notion that, at the start of any match, when scores are at zero, players still have "love for each other".[11]

Van Alen called his innovation a "tiebreaker", and he actually proposed two different kinds or versions of it: best-five-of-nine-points tiebreaker and best-seven-of-12-points tiebreaker.[23] The first lasts a maximum of 9 points, and awards victory in the set to whichever player or team first reaches 5 points – even if the other player or team already has 4; the margin of victory can be a single point. Because this "9-point" tiebreaker must end after a maximum of 9 points, even if neither player or team has a 2-point (or greater) margin, Van Alen also called it a "sudden-death tiebreaker" (If and when the score reached four points all, both players faced simultaneous set point and/or match point.). This type of tiebreaker had its Grand Slam debut at 1970 US Open and was employed there until 1974. Apart from being used for 5 years at US Open it was also used 1 year at Wimbledon and for a while on the Virginia Slims circuit and in American Colleges.
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The impetus to use some kind of a tie-breaking procedure gained force after a monumental 1969 struggle at Wimbledon between Pancho Gonzales and Charlie Pasarell. This was a 5-set match that lasted five hours and 12 minutes and took 2 days to complete. In the fifth set the 41-year-old Gonzales won all seven match points that Pasarell had against him, twice coming back from 0–40 deficits. The final score was 22–24, 1–6, 16–14, 6–3, 11–9 for Gonzales.
In 2019, the Australian Open introduced a "super-tiebreak" for singles in the final set, replacing the previous format in which the final set would continue until one player was ahead by two games. The new format for the final set is similar to the "12-point tiebreaker", but with the winner being the first to 10 points instead of 7 (and they must still win by 2 points).[27] Tennis Australia has called this a "10-point tiebreak", though this is inconsistent with the reasoning behind the naming of the "12-point tiebreaker", which represents the minimum total number of points (a score of 7–5); the same reasoning would make the new format an "18-point tiebreaker" with a minimum winning score of 10–8.[28]
The frame of rackets for all sports was traditionally made of solid wood (later laminated wood) and the strings of animal intestine known as catgut. The traditional racket size was limited by the strength and weight of the wooden frame which had to be strong enough to hold the strings and stiff enough to hit the ball or shuttle. Manufacturers started adding non-wood laminates to wood rackets to improve stiffness. Non-wood rackets were made first of steel, then of aluminum, and then carbon fiber composites. Wood is still used for real tennis, rackets, and xare. Most rackets are now made of composite materials including carbon fiber or fiberglass, metals such as titanium alloys, or ceramics.
The decision to install a top-of-the-line concrete court is just the beginning, however. You also need to evaluate your site, determine the type of playing surface you want, choose a surfacing system, and even pick out a color scheme. The next step is to find a qualified, experienced contractor who can install the court you want at a fair price. Here are some of the basics you need to know before getting in the game.
Tennis is played by millions of recreational players and is also a popular worldwide spectator sport. The four Grand Slam tournaments (also referred to as the Majors) are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open also played on hard courts.
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