Caroline Wozniacki was down 5-1 and facing two match points before outlasting Jana Fett in Melbourne on Wednesday.
Marta Kostyuk, 15, advanced to the Australian Open third round on Wednesday.
Cristiano Ronaldo, Roger Federer, Serena Williams and Rafael Nadal are among the athletes to earn Laureus awards nominations.
Day two of the Australian Open saw top seed Simona Halep advance despite an injury scare, while there was an early exit for Petra Kvitova.
Although the seeds did not emerge entirely unscathed from Tuesday's play, it was generally a day for the favourites at the Australian Open.
After making a convincing start to his Australian Open title defence, Roger Federer reflected on a remarkable 2017.
A straight-sets win marked the start of Roger Federer's Australian Open campaign, with Aljaz Bedene his victim at Melbourne Park.
Ankle injuries have been a recurring issue for Simona Halep, who suffered a nasty-looking fall at the Australian Open on Tuesday.
There are no plans to boycott next year's Australian Open over a pay dispute, Novak Djokovic has said.
Simona Halep overcame the challenge of 17-year-old Destanee Aiava and a rolled ankle to win her first-round match at the Australian Open.