4. Most adults do not develop motor skills any more in separate training sessions. Even worse, some engage in fitness and similar health and wellness exercises that develop strength through isotonic exercises (lifting weights, pulling cords, etc.) rather than dynamic exercises like throwing medicine balls or situations where footwork, dynamic balance, and dynamic force are developed (soccer, volleyball, etc.).
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]
The alternation of service between games continues throughout the match without regard to sets, but the ends are changed after each odd game within a set (including the last game). If, for example, the second set of a match ends with the score at 6–3, 1–6, the ends are changed as the last game played was the 7th (odd) game of the set and in spite of it being the 16th (even) game of the match. Even when a set ends with an odd game, ends are again changed after the first game of the following set. A tiebreaker game is treated as a single game for the purposes of this alternation. Since tiebreakers always result in a score of 7–6, there is always a court change after the tiebreaker.

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.
Sportswriter John Wertheim of Sports Illustrated stated in an article in July 2010 that Serena Williams is the greatest female tennis player ever with the argument that "Head-to-head, on a neutral surface (i.e. hard courts), everyone at their best, I can't help feeling that she crushes the other legends.".[120] In a reaction to this article Yahoo sports blog Busted Racket published a list of the top-10 women's tennis players of all time placing Martina Navratilova in first spot.[121] This top-10 list was similar to the one published in June 2008 by the Bleacher Report who also ranked Martina Navratilova as the top female player of all time.[122]
Tennis is a racket sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Each player uses a tennis racket that is strung with cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court. The object of the game is to maneuver the ball in such a way that the opponent is not able to play a valid return. The player who is unable to return the ball will not gain a point, while the opposite player will.
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