Marathon man Jack Draper says Carlos Alcaraz will have a battle on his hands when they meet in the Australian Open last 16, with the Briton showing remarkable staying power to set up the clash.

Novak Djokovic will resume his bid for a record 25th Grand Slam title when the fourth round of the Australian Open begins on Sunday at Melbourne Park, where defending women's champion Aryna Sabalenka takes on Russian teenager Mirra Andreeva.

The British No 1 is through to the Australian Open fourth round for the first time and will play Alcaraz for the fourth time