Andy Murray and Novak Djokovic highlight the action at the Australian Open on Saturday as the third round continues, but both players come into their matches with fitness concerns.
Murray faces the daunting task of returning to the court following his epic comeback against Thanasi Kokkinakis in the second round. The 35-year-old finished his match at 4am in Melbourne after five hours and 45 minutes of play, following his another five-set match against Matteo Berrettini two days earlier.
