Andy Roddick of the U.S. serves to Juan Martin Del Potro of Argentina at the U. S. Open in New York
Andy Roddick of the U.S. flips the ball to serve to Juan Martin Del Potro of Argentina during their match at the U.S. Open men's singles tennis tournament in New York September 4, 2012. REUTERS/Ray Stubblebine (UNITED STATES - Tags: SPORT TENNIS)