Not only the racket and the string matter ! Balls have direct impact on the game.
A mini-tennis ball for learning which is 50% slower.
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RT @ESPN3: The 2014 @usopen men's and women's singles draws are about to be revealed here » http://t.co/5rrQa9bHYW #usopen http://t.co/OV1…
21 Aug. - 15h50