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NEW YORK, NY - SEPTEMBER 01: Nick Kyrgios of Australia shows his emotions as he takes a rest between sets during his first round match against Andy Murray of Great Britain on Day Two of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Clive Brunskill/Getty Images)

NEW YORK, NY - SEPTEMBER 01:  Nick Kyrgios of Australia shows his emotions as he takes a rest between sets during his first round match against Andy Murray of Great Britain on Day Two of the 2015 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2015 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Clive Brunskill/Getty Images)