Alessandro Giannessi Pictures
NEW YORK, NY - SEPTEMBER 01: Alessandro Giannessi of Italy serves to Stan Wawrinka of Switzerland during his second round Men's Singles match on Day Four of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Alex Goodlett/Getty Images)