Graphic on tennischannel showed that Jack Sock's RPM of topspin on the forehand is more than Rafa Nadal. His forehand is super wipy, wristy type of swing.. i wonder how he still make good contact with heavy ball. I think we should have some article on his forehand.
fact: He plays with Alu power at approx 38lbs.
fact: He plays with Alu power at approx 38lbs.
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