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Published on Sep 24, 2009
Serves of touring pros...Andy Roddick, Andy Murray, John Isner, Maria Kirilenko, Maria Sharapova, Melanie Oudin, Li Na, Yan Zi, Mark Knowles at the 2009 US Open at 210 fps (7x slo-mo). I tagged comments on Sharapova which I discussed recently at a major tennis conference. One week later, end of September and early October 2009, Maria changed her service back to the old motion....and won the Japan Open...finally relief! A small change in rhythm can be a major change in results.