SPORT SCIENCE - Professional Tennis Registry
SPORT SCIENCE - Professional Tennis Registry
SPORT SCIENCE - Professional Tennis Registry
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© 2012 <strong>Professional</strong> <strong>Tennis</strong> <strong>Registry</strong>All rights reservedReproduction of any portion ofPractical On Court Applications for Sport Scienceis not permitted without written consent of PTR.PTR logo is protected through trademark registration in the United States Office of Patents and Trademarks