PERTH, AUSTRALIA - JANUARY 02: Roger Federer of Switzerland serves to Dan Evans of Great Britain in the men's singles match on day two of the 2017 Hopman Cup at Perth Arena on January 2, 2017 in Perth, Australia. (Photo by Paul Kane/Getty Images)
PERTH, AUSTRALIA - JANUARY 02: Roger Federer of Switzerland serves to Dan Evans of Great Britain in the men's singles match on day two of the 2017 Hopman Cup at Perth Arena on January 2, 2017 in Perth, Australia. (Photo by Paul Kane/Getty Images)