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MELBOURNE, AUSTRALIA - JANUARY 28: Roger Federer of Switzerland plays a backhand in his men's singles final match against Marin Cilic of Croatia on day 14 of the 2018 Australian Open at Melbourne Park on January 28, 2018 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 28: Roger Federer of Switzerland plays a backhand in his men's singles final match against Marin Cilic of Croatia on day 14 of the 2018 Australian Open at Melbourne Park on January 28, 2018 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)
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