NEW YORK, NY - SEPTEMBER 05: Kei Nishikori of Japan during his men's singles quarter-final match against Marin Cilic of Croatia on Day Ten of the 2018 US Open at the USTA Billie Jean King National Tennis Center on September 5, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)
