Novak Djokovic’s quest for a record-extending 25th grand slam title has been cut short at the Australian Open after he stunningly retired from his semifinal match due to injury.

Novak Djokovic played the first set of his Australian Open semi-final before retiring through injury as boos broke out from the crowd - but Alexander Zverev was quick to hit back

Novak Djokovic refused to let anything stop his pursuit of a record 25th Grand Slam trophy in the Australian Open quarterfinals. Not a problem with his left leg. Not an early deficit. And not the kid across the net,