MONTREAL, ON - AUGUST 15:  Andy Murray of Great Britain signs autographs for young fans after his victory over Kei Nishikori of Japan during day six of the Rogers Cup at Uniprix Stadium on August 15, 2015 in Montreal, Quebec, Canada.  Andy Murray defeated Kei Nishikori 6-3, 6-0.  (Photo by Minas Panagiotakis/Getty Images)