NEW YORK, NY - AUGUST 31: Karen Khachanov of Russia returns the ball through his legs during his men's singles third round match against Rafael Nadal of Spain on Day Five of the 2018 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Julian Finney/Getty Images)
