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LONDON, ENGLAND - JULY 06: Steve Johnson of The United States plays a forehand in his Men's Singles third round match against Kei Nishikori of Japan during Day six of The Championships - Wimbledon 2019 at All England Lawn Tennis and Croquet Club on July 06, 2019 in London, England. (Photo by Shaun Botterill/Getty Images)

LONDON, ENGLAND - JULY 06: Steve Johnson of The United States plays a forehand in his Men's Singles third round match against Kei Nishikori of Japan during Day six of The Championships - Wimbledon 2019 at All England Lawn Tennis and Croquet Club on July 06, 2019 in London, England. (Photo by Shaun Botterill/Getty Images)