Cameron Spencer
NEW YORK, NY - SEPTEMBER 06: Novak Djokovic of Serbia celebrates a point during his men's singles quarterfinal match against Juan Martin Del Potro of Argentina on Day Eleven of the 2012 US Open at USTA Billie Jean King National Tennis Center on September 6, 2012 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Cameron Spencer/Getty Images)