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,

It's hard to watch the way Jannik Sinner plays tennis and not think of Novak Djokovic. Of all the praise bestowed on Sinner after he won his second consecutive Australian Open championship, and third Grand Slam title overall,

Djokovic, who retired due to injury after the first set, was booed by the crowd as he walked off Rod Laver Arena.

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.

Djokovic is out of the Australian Open after retiring from his semi-final, with Zverev through to face Sinner on Sunday

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).

Novak Djokovic shared a heartfelt message to Alexander Zverev after the second seed lost in straight sets against Jannik Sinner in the Australian Open final on Sunday at the Rod Laver Arena. Sinner won 6-3,

Alexander Zverev urges fans not to boo Novak Djokovic, who retired in the Australian Open Semifinals due to injury

The semifinals are scheduled to start at 10:30 p.m. EST and will be broadcast on ESPN and ESPN Deportes. Fans looking to watch can do so for free through FuboTV, which offers a free trial and $30 off your first month, or DirecTV Stream, which offers a free trial. SlingTV doesn’t offer a free trial but does have other promotional offers available.