There are no boundaries in trash talk.  I’ve seen it get real nasty on a basketball court and football field but during a tennis match?  Yup, tennis player Nick Kyrgios told his opponent DURING a match that his girlfriend is juggling another tennis player’s balls.

The supreme trash talking went down during a televised match in Montreal, Kyrgios had just aced French Open champ Stan Wawrinka, and as he prepped for his next serve, Kyrgios mutters, “Kokkinakis banged your girlfriend. Sorry to tell you that, mate.”

The woman in question is believed to be 19-year-old Croatian player Donna Vekic, who Wawrinka was rumored to be dating after separating from wife Ilham Vuilloud.

Thanasi Kokkinakis had also been linked with Vekic after the pair played mixed doubles together at the 2014 Australian Open.

In his post-match press conference, Wawrinka told reporters he had confronted Kyrgios, who has “big problems”, in the locker room after the match, and said he hopes the ATP comes down hard on him.

“He tried to avoid me (in the locker room), but I confronted him.”

He also said more on his Twitter account.

*tweets in gallery above*

To lose and hear that is the ultimate kicking a man while he’s down…

Shay Marie: Twitter || Instagram

source: TMZ Sports || ABC AU