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NEW YORK, NY - SEPTEMBER 05: A general view of Arthur Ashe Stadium during the fourth round Men's Singles match between Andy Murray of Great Britain and Grigor Dimitrov of Bulgaria on Day Eight of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 5, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NY - SEPTEMBER 05: A general view of Arthur Ashe Stadium during the fourth round Men's Singles match between Andy Murray of Great Britain and Grigor Dimitrov of Bulgaria on Day Eight of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 5, 2016 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Al Bello/Getty Images)