NEW YORK, NY - SEPTEMBER 09: Novak Djokovic of Serbia reacts by ripping off his shirt while playing against Gael Monfils of France during their Men's Singles Semifinal Match on Day Twelve of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2016 in the Queens borough of New York City. (Photo by Mike Stobe/Getty Images for USTA)
