It's far from the first time the 31-year-old has raised feminist issues in public. (AP)

Andy Murray has long championed the empowerment of women in the professional sports world. On Monday, the former world No. 1 again spoke out against the inequalities in gender when Norweigan footballer Ada Hegerberg was asked if she knew how to twerk at a ceremony in Paris.

This question came from host DJ Martin Solveig just moments after she won the Ballon D’Or, which honors the world’s best female football player.

“Why do women have to put up with that [crap]?” Murray said. “What questions did they ask [Kylian] Mbappe and Luka Modric? I’d imagine something to do with football. And to everyone who thinks people are overreacting and that it was just a joke. It wasn’t. I’ve been involved in sport my whole life and the level of sexism is unreal.”

When Amelie Mauresmo was his coach, Murray was extremely vocal in defending her contributions to his game. The Frenchwoman was recently named Lucas Pouille's coach, stepping down from her role as the 2019 Davis Cup captain. 

Murray is the father of two young girls, and his mother Judy Murray is a major public figure in sports as well as a proponent of female empowerment. Her youngest son has said he considers himself a feminist. 

“If being a feminist is about fighting so that a woman is treated like a man then yes, I suppose [yes]," Murray said.