NEW YORK, NY - SEPTEMBER 13: Chair Umpire Eva Asderaki-Moore looks on during the Men's Singles Final match between Roger Federer of Switzerland and Novak Djokovic of Serbia on Day Fourteen of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 13, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Michael Heiman/Getty Images)
