Naomi Osaka came from one set down to defeat Karolina Muchova in the second round of the 2025 Australian Open.

Fourteen seeded players, including last year’s finalists Aryna Sabalenka and Zheng Qinwen, take center stage as the top half of the draw battles for a spot in the third round.

A four-time Grand Slam champion, Osaka returned from maternity leave last year and lost in the first or second round of all four major tournaments. The 27-year-old Japan native has not won any event on the WTA Tour since capturing her second Australian Open title to start 2021.

Naomi Osaka defeated No. 20 Karolina Muchova 1-6, 6-1, 6-3 on Wednesday to reach the third round of a major for the first time since the 2022 Australian Open.

MELBOURNE–Naomi Osaka said she was enjoying a little bit of revenge against Karolina Muchova at the Australian Open 2025 on Wednesday, recalling how the Czech had ended her U.S. Open campaign last year when she was sporting her “best outfit ever”.