Novak Djokovic, Coco Gauff roll to Australian Open's 4th round. Naomi Osaka retires due to injury and Jessica Pegula was upset in the third round.

Coco Gauff still hasn't lost a match or even at set at the Australian Open — or, actually, this season. She moved into the fourth round at Melbourne Park with a straightforward 6-4, 6-2 victory over 2021 U.

American tennis player Danielle Collins embraced the Australian Open boos after her latest win. But there's more to her heel turn than meets the eye.

Danielle Collins of the United States provokes the crowd after defeating Destanee Aiava of Australia in the second round on Day 5 of the 2025 Australian Open at Melbourne Park on January 16, 2025 Danielle Collins got the last laugh — and a "big fat paycheck" — at the 2025 Australian Open.

Danielle Collins was involved in a heated exchange with fans during her Australian Open second-round win over Destanee Aiava, with the American telling them to "shut up".