Hyeon Chung Pictures

  • MELBOURNE, AUSTRALIA - JANUARY 26: Roger Federer of Switzerland consoles Hyeon Chung of South Korea after Chung retired injured due to a blistered foot in their semi-final match against on day 12 of the 2018 Australian Open at Melbourne Park on January 26, 2018 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)