NEW YORK, NY - SEPTEMBER 08: A fan reacts as Marin Cilic of Croatia plays against Kei Nishikori of Japan during their men's singles final match on Day Fifteen of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 8, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Jaime L. Mikle/Getty Images for USTA)