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.

While there have been plenty of surprises in the men’s bracket so far, most of the top women have progressed through the draw without an issue.

After losing the first set 7-6 (3), two-time Australian Open champ Naomi Osaka retired from her third-round match against Belinda Bencic due to injury.

Danielle Collins has long been one of women's tennis' most fiery competitors. But after her tight second-round Australian Open win over Australian underdog Destanee Aiava, Collins showed she can bring it with the crowd,

Danielle Collins has gotten into a back-and-forth with a booing crowd at the Australian Open after eliminating a local player

Danielle Collins appeared to revel in playing the part of pantomime villain at the Australian Open on Thursday as she took down home favorite Destanee Aiava 7-6, 4-6, 6-2 in front of a raucous crowd.