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LONDON, ENG - JULY 10: Andy Murray (GBR) in action during his 4th round match on July 10, 2017 during the Wimbledon Championships at the All England Lawn Tennis and Croquet Club in London, England.. (Photo by Cynthia Lum/Icon Sportswire via Getty Images)

LONDON, ENG - JULY 10:  Andy Murray (GBR) in action during his 4th round match on July 10, 2017 during the Wimbledon Championships at the All England Lawn Tennis and Croquet Club in London, England.. (Photo by Cynthia Lum/Icon Sportswire via Getty Images)

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Sam Querrey in action against Kevin Anderson on day seven of the Wimbledon Championships at The All England Lawn Tennis and Croquet Club, Wimbledon. (Photo by John Walton/PA Images via Getty Images)

Sam Querrey in action against Kevin Anderson on day seven of the Wimbledon Championships at The All England Lawn Tennis and Croquet Club, Wimbledon. (Photo by John Walton/PA Images via Getty Images)

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LONDON, ENGLAND - JULY 10: Milos Raonic of Canada plays a forehand during the Gentlemen's Singles fourth round match against Alexander Zverev of Germany on day seven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, England. (Photo by Shaun Botterill/Getty Images)

LONDON, ENGLAND - JULY 10:  Milos Raonic of Canada plays a forehand during the Gentlemen's Singles fourth round match against Alexander Zverev of Germany on day seven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, England.  (Photo by Shaun Botterill/Getty Images)

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LONDON, UNITED KINGDOM - JULY 10: Roger Federer of Switzerland in action against Grigor Dimitrov of Bulgaria (not pictured) on day seven of the 2017 Wimbledon Championships at the All England Lawn and Croquet Club in London, United Kingdom on July 10 2017. (Photo by Lindsey Parnaby/Anadolu Agency/Getty Images)

LONDON, UNITED KINGDOM - JULY 10: Roger Federer of Switzerland in action against Grigor Dimitrov of Bulgaria (not pictured) on day seven of the 2017 Wimbledon Championships at the All England Lawn and Croquet Club in London, United Kingdom on July 10 2017.
 (Photo by Lindsey Parnaby/Anadolu Agency/Getty Images)