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Old 02-05-2013, 05:15 AM   #4
Join Date: Dec 2012
Posts: 1,294

thanks SA for these pictures.

the release point for a real serve.... I meant that's the point when the racket is at full extension, as shown in your Sampras picture.

regarding pronation - the racket did rotate on it's long axis, but only did 2-3 revolutions in the air.... does that sound right? the head over butt tumble was much faster though, not sure, maybe 12 revolutions in the air.

does that sound right?
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