MONTREAL (CBSNewYork/AP) — The ATP fined Nick Kyrgios on Thursday for his “insulting remark” toward French Open champion Stan Wawrinka during a match at the Rogers Cup.

The organization did not announce the amount of the fine but said in a statement that further details would be released after Kyrgios was notified. Wawrinka had urged tennis authorities to take action in a Twitter post earlier Thursday.

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On Wednesday night, a courtside microphone picked up Kyrgios saying that fellow Australian player Thanasi Kokkinakis had slept with a player who is reportedly Wawrinka’s girlfriend.

Wawrinka later tweeted: “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.”

He called the 20-year-old’s Australian’s words “not only unacceptable but also beyond belief.”

The ATP rule book allows a fine of up to $10,000 for incidents of verbal abuse or unsportsmanlike conduct.

The 30-year-old Wawrinka, ranked fifth in the world, announced in April that he had separated from his wife, with whom he has a daughter. The Swiss player has since been linked with 19-year-old Donna Vekic of Croatia, who is ranked 127th.

Vekic played mixed doubles with Kokkinakis, also 19 and ranked No. 76, at the 2014 Australian Open as a wild-card entry.

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Kyrgios beat Wawrinka on Wednesday when the Swiss player retired with a lower-back injury while trailing 4-0 in the third set.

In a post-match interview on court, Kyrgios said Wawrinka had provoked him.

“He was getting a bit lippy at me so, I don’t know, it’s just in-the-moment sort of stuff,” Kyrgios said. “I don’t really know, I just said it.”

Wawrinka’s coach, Magnus Norman, also criticized Kyrgios, who has been at the center of controversy in recent weeks.

At Wimbledon last month, Kyrgios was booed by spectators in a fourth-round loss to Richard Gasquet of France. Kyrgios appeared to make little attempt to return Gasquet’s serve during the third game of the second set after a dispute with the chair umpire.

That incident prompted Australian swimming great Dawn Fraser to question the character of Kyrgios and suggest he could leave the country and return to where his parents came from.

Kyrgios, who was born in Australia to a father born in Greece and mother born in Malaysia, replied on Twitter that Fraser was a “blatant racist.” She later apologized.

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