Second seed Aryna Sabalenka fought her way past Marketa Vondrousova to reach the Australian Open fourth round.
The Belarusian, bidding to reach the semi-finals at Melbourne Park for the first time, recovered well to beat the Czech 31st seed 4-6 6-3 6-1.
She will face Kaia Kanepi next after the Estonian beat Australian wildcard Maddison Inglis 2-6 6-2 6-0.
Earlier, Simona Halep continued her dominant streak with a crushing 6-2 6-1 win over Danka Kovinic.
Sabalenka had a breakthrough 2021, reaching both the Wimbledon and US Open semi-finals.
She has struggled on serve this season with 70 double faults in her previous four matches this year, including 31 in her first two matches at the Australian Open.