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MELBOURNE, AUSTRALIA - JANUARY 20: Roger Federer of Switzerland plays a forehand in his first round match against Steve Johnson of the United States on day one of the 2020 Australian Open at Melbourne Park on January 20, 2020 in Melbourne, Australia. (Photo by TPN/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 20:  Roger Federer of Switzerland plays a forehand in his first round match against Steve Johnson of the United States on day one of the 2020 Australian Open at Melbourne Park on January 20, 2020 in Melbourne, Australia. (Photo by TPN/Getty Images)