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Old 03-02-2011, 02:24 PM   #22
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Join Date: Oct 2005
Posts: 34,434

Originally Posted by Chenx15 View Post
I understand that, the ball should be moving sideways instead of up and down. because pronation is a horizontal brush instead of vertical
It is a horizontal brush, followed by a downward and away motion. You can hit a slice serve without pronation, as some of the women do from the deuce court (righties)- they seem to come from the side on their arm, and supinate.
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