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Old 09-27-2012, 06:58 AM   #14
Join Date: Apr 2010
Posts: 5,059

You also can improve your serve by using the off L arm. Keep it up high pointing at the ball until you start forward motion. Also, you can pull it down against chest to slow off side and speed up R side as it swings to contact. Watch video of Federer and Sampras serve and watch how they use their L arm.
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