WASHINGTON, DC - AUGUST 04: Daniil Medvedev of Russia returns a shot to Nick Kyrgios of Australia during the men's singles final of the Citi Open at Rock Creek Tennis Center on August 04, 2019 in Washington, DC. (Photo by Rob Carr/Getty Images)
WASHINGTON, DC - AUGUST 04: Daniil Medvedev of Russia returns a shot to Nick Kyrgios of Australia during the men's singles final of the Citi Open at Rock Creek Tennis Center on August 04, 2019 in Washington, DC. (Photo by Rob Carr/Getty Images)