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Old 01-30-2013, 10:35 PM   #33
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Join Date: May 2012
Posts: 953

It's because Rafa doesn't always have a straight arm. The straight arm only happens when he has perfect positioning on the ball, often times you'll see him bend the arm if he's jammed a little bit. His motion in the takeback and forward swing transition are more similar to Rafa than Roddick, despite having a bend.
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