Top seed Iga Swiatek was forced to dig deep to get past Danielle Collins on Thursday's action in the Australian Open.
Novak Djokovic kept his Australian Open title defence on track with a gritty performance in Melbourne on Wednesday.
Rising teenage star Mirra Andreeva breezed past the experienced Ons Jabeur in the second round of the Australian Open on Wednesday.
Carlos Alcaraz beat veteran Richard Gasquet in straight sets to secure his place in the second round of the Australian Open.
Emma Raducanu made a convincing grand-slam return with victory over Shelby Rogers in the first round of the Australian Open.
Iga Swiatek emerged victorious in the clash of grand slam champions as she defeated Sofia Kenin to secure her place in the second round of the Australian Open.