Women’s tennis pro Caroline Wozniacki stands accused of racism after she mimicked Serena Williams.

During a recent match against Maria Sharapova in Sao Paulo, Brazil, Wozniacki stuffed towels down her shirt and skirt and much of the crowd laughed, including men’s tennis legend Roger Federer. The display was seen as an impersonation of Williams.

Williams declined to comment, and according to reports, the two players are friends.

The 22-year-old from Denmark has now felt the wrath of fans on social media, but this is not first time she, or other players, have impersonated Williams.

Wozniacki danced around to a Rihanna song as if she were Williams last December, and the now-retired Andy Roddick has also imitated the 15-time Grand Slam champion.

The video below shows Wozniacki’s performance, and you can judge for yourself: