2. How to Play Tennis
1. Eyes shut Once you've developed a sound service motion, it's important that you toss the ball into the same spot each and every time. You should be able to serve with your eyes closed, because the ball should be in the same spot every time. 2. Knock Knock The key to having a powerful serve is in creating a loop in your backswing and letting your racquet head drop behind you as you toss the ball. This lengthens the swing, and more length means increased power. Serving requires using the big muscles of the body. Ask Pete Sampras, Boris Becker, or Goran Ivanisevic where their power comes from and they'll say their legs, hips, and shoulders. 3. Same as it ever was When you're practicing your serve, go through the same pre-serve rituals you use during a match.

2. 如何打网球
1、闭上你的眼 一旦你形成了良好的发球姿势， 那么要做到每一次都将球抛到相同的位置，这一点非常关键。 每次发球的时候，你都可以把眼睛闭上，因为每次球都应该落在相同的位置。 2、击球、击球 要发出有力的球关键在于在击球前尽量把手臂轮成圆圈， 抛起球后，把球拍举到头的后方。 这样会增大挥拍的幅度，幅度越大，击球的力量也就越大。 发球的时候应该用身体的大肌肉群。 问一问桑普拉斯、贝克尔或伊万尼塞维奇他们的力量是从何而来？他们会说是从他们的腿部、臀部和肩部而来。 3、一如既往 当你练球的时候，每次都应该做在相同的预备发球动作，就象每次比赛之前所做的那样。