NEW YORK, NY - AUGUST 31:  Federico Delbonis of Argentina returns a shot to Roberto Bautista Agut of Spain during his second round Men's Singles match on Day Three of the 2016 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2016 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Mike Hewitt/Getty Images)