Nick Kyrgios has been developing a reputation for disrespectful behaviour this year.

He faced boos from the Wimbledon crowd earlier in the year for appearing to throw a game against Richard Gasquet in the round of 16, having already been involved in heated disagreements with umpires throughout the tournament.

In the Davis Cup, during a loss to Aleksandr Nedovyesov in a singles match, he loudly muttered during the third set:

I don’t want to be here.

However, his latest indignity could be said to be his worst.

The Australian has been condemned for a sledge on world number five Stanislas Wawrinka at the Rogers Cup in Montreal, in which he alleged that another player had "banged" his girlfriend.

Association of Tennis Professionals (ATP)Update: Nick Kyrgios apologised on his Facebook page.

"I would like to take this opportunity to apologise for the comments I made during the match last night vs Stan...

Posted by Nick Kyrgios on Thursday, 13 August 2015
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