2009年4月底的网球练习录像
Mark Tennis Groundstrokes April 29 2009 _ 2 from Mark Tu on Vimeo.
未来加强的地方是速度，包括拍头的速度，移动的速度，正手的引拍。
一些来自Tennis-warehouse的网友评价：
As said, you can swing faster with a heavier racket that is headlight than a lightweight racket that is head heavy.
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So your racket is fine.
Relax your grip and hitting arm more, to get rackethead speed. With more rackethead speed, you need to hit with more topspin, to keep the ball in, so maybe a change to SW grip from your current Eastern grip.
If you want to swing slow, keep your current Eastern grip.
Especially on serves, you need a real Continental grip and really twist inward …pronate.. with your hitting arm to get the racket head speed.
I see waaaaaaaaaay to many easy misses in your vids, so lotsa practice, watch the ball, and don’t give away points to 70 mph serves. （LeeD)
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On forehand and serve.
On your forehand, definitely work on get your shoulders turn more during your take back because you’re consistently arming the ball on your forehand rather than generating power from your rotation. Also, your follow through is somewhat inconsistent. You should be finishing your stroke above your left shoulder. You should position your left hand above your left shoulder after you initiate your stroke and then catch your racquet into your left hand. Also, you will occasionally tack on a windshield-wiper-like follow through to your stroke. Maybe you’ve seen pros do this, but you should not do this. You are not hitting a ww. You are just tacking on the follow through at the end, and this will destroy your consistency. Focus on catching the racquet in the left hand above the left shoulder to improve consistency of your stroke and eliminate these tendencies.
On your serve, you are opening your palm and the face of your racquet up to the sky during your upswing. This is preventing you from getting a good racquet drop to initiate your forward swing. Also, when you follow through, you should tuck your left arm across your belly and keep it there until the follow through is complete. Your serving arm should come over your left arm at the end of the motion. (rubberduckies)
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On backhand:
1) You have to lean into the backhand. This mean ALL of your weight is on your front foot (right in your case) at contact.
2) More hip shoulder rotation. You want to be showing your opponent the back of your shirt.
3) Bring your none hitting hand back or focus on popping your chest out.