Novak Djokovic has come back to defeat Carlos Alcaraz 4-6, 6-4, 6-3, 6-4 to reach the Australian Open semifinals for the 12th time.

Jannik Sinner has labelled Carlos Alcaraz and Novak Djokovic’s rivalry as "the best in tennis" after the pair played each other at the Australian Open.

Novak Djokovic beat young rival Carlos Alcaraz 4-6 6-4 6-3 6-4 in a gladiatorial battle worthy of a title clash to charge into the Australian Open semi-finals on Tuesday and remain in the hunt for a record 25th Grand Slam title.