WATCH: Wawrinka calls for action after Kyrgios insults girlfriend on court

On-court microphones recorded 20-year-old Kyrgios walking to the net and saying: “Kokkinakis banged your girlfriend. Sorry to tell you that mate”

French Open champion Stan Wawrinka has branded Nick Kyrgios “unacceptable” and called for action to be taken against him after the Australian appeared to make comments about his girlfriend.

Kyrgios knocked Wawrinka out of the Rogers Cup after the Swiss retired hurt, but it was an apparent exchange at the end of the first set which has become the focal point.