Finalist Novak Djokovic (L) of Serbia and Rafael Nadal of Spain during the award ceremony after Nadal won the men's championship title at the U.S. Open Championship held at the USTA Billie Jean King National Tennis Center on September 9, 2013 in New York City. Nadal won 6-2, 3-6, 6-4, 6-1. UPI /Monika Graff