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WASHINGTON, DC - AUGUST 02: Andy Murray of Great Britain shakes hands with Marius Copil of Romania after winning their match during Day Six of the Citi Open at the Rock Creek Tennis Center on August 2, 2018 in Washington, DC. (Photo by Mitchell Layton/Getty Images)

WASHINGTON, DC - AUGUST 02:  Andy Murray of Great Britain shakes hands with Marius Copil of Romania after winning their match during Day Six of the Citi Open at the Rock Creek Tennis Center on August 2, 2018 in Washington, DC.  (Photo by Mitchell Layton/Getty Images)