Novak Djokovic is out of the Australian Open in stunning fashion. The 24-time slam champion medically retired immediately after dropping the first set of his semifinal match against No. 2 Alexander Zverev in a tiebreak 7-6 (5).

Spectators booed as the 37-year-old Djokovic walked off toward the locker room, and he stopped, turned around and responded by giving two thumbs-up.

Novak Djokovic retired injured after losing the first set 7-6(5) against Alex Zverev on Friday to put the German through to his first Australian Open final.

Defending champion Aryna Sabalenka will battle American 19th seed Madison Keys in the final on Saturday looking to become the first woman since Martina Hingis from 1997-99 to win the Australian Open title three times in a row.

The Madison Keys who will play two-time defending champion Aryna Sabalenka for the title at the Australian Open on Saturday night is not the same Madison Keys who was the runner-up at the U.S.

MELBOURNE, Australia — Things are somewhat out of control at the Australian Open this year, and that’s got only a little to do with the results on the courts.

Australian Open semi-finalist Ben Shelton has taken the Grand Slam's on-court interviewers to task for being "disrespectful" to players. Shelton reached his first semi-final at Melbourne Park on Wednesday with a four-set win over Italian Lorenzo Sonego at Rod Laver Arena.

Shelton criticized Tony Jones' comments about Novak Djokovic as well as on-court interviews at the tournament.