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MELBOURNE, AUSTRALIA - JANUARY 24: Roger Federer of Switzerland plays a forehand during his Men's Singles third round match against John Millman of Australia on day five of the 2020 Australian Open at Melbourne Park on January 24, 2020 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 24: Roger Federer of Switzerland plays a forehand during his Men's Singles third round match against John Millman of Australia on day five of the 2020 Australian Open at Melbourne Park on January 24, 2020 in Melbourne, Australia. (Photo by Cameron Spencer/Getty Images)