而拉法纳达尔使用更极端的握拍，趋近于西方式握拍，这是因为他向上击球，产生更多旋转。
Because he swings up on the ball so much more, he generates more topspin, keeps the ball in play, and grinds opponents into the ground.
如果球员们不同意这就是当时那个球的球印，那么仲裁人(或者助理)应该搞清从球员最后进行了一个怎样的击球并且从方向上看这个球是从什么位置打过来的。
If the players disagree on which mark it is, the Referee (or assistant) should find out from the players what kind of shot was played and the direction in which the ball was hit.
如果你过早抬头，会引起拍头过早向上挥动，这常常引发击球不够扎实有效。
If your head lifts up, so does your racquet, often causing miss-hits.
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