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.

Defending champion Aryna Sabalenka had to battle hard to beat Denmark's Clara Tauson 7-6 (7/5), 6-4 on Friday and reach the second week of the Australian Open after suffering another bout of the serving jitters.