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,

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).

Alexander Zverev chided the crowd after they booed Novak Djokovic for retiring due to injury after the first set in an Australian Open semifinal.

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

Novak Djokovic retired injured after losing the opening set of his clash with Alexander Zverev on Friday, sending the German to a first Australian Open final where he will take on defending champion Jannik Sinner for a maiden Grand Slam title.

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,

Injured Djokovic decides not to continue after losing first set as Zverev reaches his first Australian Open final

Novak Djokovic was booed off court after his Australian Open semi-final was cut short due to injury, and his Davis Cup captain issued a passionate defense.

Andy Roddick has admitted he 'felt icky' after seeing Australian Open fans turn on Novak Djokovic at the recent tournament in Melbourne. Djokovic decided to withdraw from his semi-final clash against Alexander Zverev on Friday,