Melbourne, Jan. 23 -- Two-time Australian Open champion Aryna Sabalenka faced a stern challenge as she battled her way into the fourth round of the ongoing Australian Open in Melbourne with a 7-6(4), 7-6(7) victory against Anastasia Potapova on Friday

Meanwhile, Coco Gauff battled past fellow American Hailey Baptiste to reach the fourth round, rallying from a set down for a 3-6, 6-0, 6-3 victory.

Sabalenka led 7-6(4), 4-0 before Potapova staged a comeback, but the top seed held firm, saving four set points in a tense second-set tiebreak to secure a 7-6(4), 7-6(7) victory as per the WTA website.

After the win, Sabalenka praised Potapova's game, saying she was under constant pressure throughout the match. She admitted that she was strugg...