see more

LONDON, ENGLAND - JULY 10: Roger Federer of Switzerland plays a forehand in his Men's Singles Quarter Final match against Kei Nishikori of Japan during Day Nine of The Championships - Wimbledon 2019 at All England Lawn Tennis and Croquet Club on July 10, 2019 in London, England. (Photo by Matthias Hangst/Getty Images)

LONDON, ENGLAND - JULY 10: Roger Federer of Switzerland plays a forehand in his Men's Singles Quarter Final match against Kei Nishikori of Japan during Day Nine of The Championships - Wimbledon 2019 at All England Lawn Tennis and Croquet Club on July 10, 2019 in London, England. (Photo by Matthias Hangst/Getty Images)