Novak Djokovic has retired from his Australian Open semifinal against Alexander Zverev after losing the first set in a tiebreak. Djokovic missed a regulation putaway volley on top of the net down 5-6,

Djokovic is only interested in tennis' biggest prizes. He still has the game to win them, but at age 37 his body is letting him down

Novak Djokovic's bid for 11th Australian Open title ends after a muscle tear in his left leg. He says injury happened during match vs. Carlos Alcaraz.

Novak Djokovic is 37 and was forced to stop playing because of an injury at two of the past four Grand Slam tournaments.

Former world number one Boris Becker has explained his comments about Novak Djokovic’s recent injury during the Australian Open. The 37-year-old is regarded as the greatest player in the history of men’s tennis in the singles category,

Zverev will face defending Australian Open champion and No. 1 seed Jannik Sinner, who beat American Ben Shelton 7-6 (2), 6-2, 6-2, in Sunday's final. Zverev is pursuing his first major tournament title.

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).

Some critics questioned the legitimacy of his injury that led to his medical retirement from the Australian Open semifinal.

Alexander Zverev likened Australian Open champ Jannik Sinner to "prime" Djokovic, who holds the record for the most men's major titles (24)

Jannik Sinner has now won 10 straight matches against fellow top-10 players, becoming the youngest player to achieve that feat since Rafael Nadal in 2008

Australian Open boss Craig Tiley has defended the crowd behaviour at this year's tournament after it was placed firmly under the microscope during the 15-day event.