Florian Mayer Pictures
NEW YORK, NY - AUGUST 27: Florian Mayer of Germany returns the ball during his men's singles first round match against Borna Coric of Croatia on Day One of the 2018 US Open at the USTA Billie Jean King National Tennis Center on August 27, 2017 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)