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,

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.

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

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

On Sunday, Alexander Zverev will chase his first Major title against Jannik Sinner in the Australian Open final. The German is through to his third Major final, hoping to lift his first notable trophy. Novak Djokovic backed Zverev to defeat Sinner and join tennis immortals!

Of all the praise bestowed on Jannik Sinner after he won his second consecutive Australian Open championship, and third Grand Slam title overall, nothing felt as significant as the comparison made by runner-up Alexander Zverev.

Jannik Sinner retained his Australian Open title with an emphatic 6-3 7-6(4) 6-3 win over Alexander Zverev on Sunday, breaking new ground for Italian tennis and leaving his German rival smarting after a third Grand Slam final defeat.

Defending champion Jannik Sinner will face Alexander Zverev in the first Australian Open men’s final between the players ranked No. 1 and No. 2 since 2019

Jannik Sinner beat Alexander Zverev in three sets for his second Australian Open title in a row. Read more on Boston.com.