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MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland serves in his third round match against Richard Gasquet of France on day six of the 2018 Australian Open at Melbourne Park on January 20, 2018 in Melbourne, Australia. (Photo by XIN LI/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland serves in his third round match against Richard Gasquet of France on day six of the 2018 Australian Open at Melbourne Park on January 20, 2018 in Melbourne, Australia. (Photo by XIN LI/Getty Images)
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