NEW YORK, NY - SEPTEMBER 08: Novak Djokovic of Serbia shakes hands with Feliciano Lopez of Spain after defeating him during their Men's Singles Quarterfinals match on Day Nine of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 8, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Cliff Hawkins/Getty Images)
