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MELBOURNE, AUSTRALIA - JANUARY 26: Roger Federer of Switzerland reacts in his quarter final match against Tomas Berdych of the Czech Republic during day nine of the 2016 Australian Open at Melbourne Park on January 26, 2016 in Melbourne, Australia. (Photo by Recep Sakar/Anadolu Agency/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 26: Roger Federer of Switzerland reacts in his quarter final match against Tomas Berdych of the Czech Republic during day nine of the 2016 Australian Open at Melbourne Park on January 26, 2016 in Melbourne, Australia. (Photo by Recep Sakar/Anadolu Agency/Getty Images)