MONTREAL — French Open champion Stan Wawrinka has urged tennis authorities to take action against Nick Kyrgios for an "unacceptable" comment during a match at the Rogers Cup.
Wawrinka wrote on his Twitter account Thursday that the Australian's words were "not only unacceptable but also beyond belief."
A courtside microphone picked up Kyrgios saying that Australian player Thanasi Kokkinakis had slept with a player who is reportedly Wawrinka's girlfriend.
Wawrinka wrote on Twitter: "There is no need for this kind of behaviour on or off the court and I hope the governing body of this sport does not stand for this.