Toronto: WTA Tour chairman Stacey Allaster and women’s tennis legend Martina Navratilova demanded tougher punishment for Australian ATP player Nick Kyrgios in the wake of his sex slur during a match.

Martina Navratilova

Kyrgios was fined $12,500 by the ATP Tour on Thursday as it launched an investigation into the 20-year-old’s remark to French Open champion Stan Wawrinka in a second-round match Wednesday at the ATP Rogers Cup in Montreal.

“The statement made by Nick Kyrgios is crude and unacceptable,” Allaster said in a statement. “I commend the ATP on assessing the on-site maximum fine and urge there to be further sanctions.”