There's in-competition trash talk and then there's what tennis player Nick Kyrgios said to his opponent, Stan Wawrinka, this week.

ESPN camera's picked up Kyrgios telling Wawrinka during a match:

"Kokkinakis banged your girlfriend. Sorry to tell you that, mate."

Thanasi Kokkinakis is a 19-year-old Australian tennis player. Kyrgios is also Australian.

Wawrinka and Kokkinakis have both been linked to Donna Vekic, a female Croatian tennis player.