As mentioned above, in the professional forehand, the rotation of the racquet head into the path of the ball is delayed until just before the strike stage.

如上所提到的，在职业球手的正手拍，网球拍头的旋转进入球的路径内的时间点，被延迟到就刚刚在打击阶段之前。

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The umpire called "out" so many times when I hit the ball with a forehand-stroke.

每当我以正手拍击球时，很多次裁判都判出界。

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Research indicates the key skill for guaranteeing the successful rate and stability of forehand attack is to return a ball at it initial rising period or initial down period.

经研究发现，在来球上升初期和下降初期击球是保证攻球稳定性和成功率的关键技术。

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But it's his singular weapon--a devastating forehand that puts enough topspin on the ball to keep opponents running around in circles--that has pushed him to legendary status.

FORBES: Magazine Article

Later, Tsonga attempted a down-the-line forehand winner, a tough shot because the ball must travel over the outside of the net, which is six inches higher than the middle.

WSJ: Rafael Nadal, the Underrated Tactician, Stalks Novak Djokovic

At the moment, the racket's technology can identify the type of shot a player hits (forehand, backhand, serve), the kind of spin a player imparts on the ball and the power of a swing.

WSJ: Babolat Microchip Racket: The Racket of the Future