NEW YORK, NY - SEPTEMBER 04:  Mikhail Kukushkin of Kazakhstan reacts to a point against Marin Cilic of Croatia during their Men's Singles Third Round match on Day Five of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 4, 2015 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Al Bello/Getty Images)