Alessandro Giannessi Pictures
NEW YORK, NY - SEPTEMBER 01: Stan Wawrinka of Switzerland shakes hands with Alessandro Giannessi after their 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 Michael Reaves/Getty Images)