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Nick Kyrgios has yet again hit the headlines for the wrong reasons.
Midway through the second set of a match against French Open champion Stan Wawrinka, he informed his opponent that teenage player Thanasi Kokkinakis had slept with the Swiss player's girlfriend.
"Kokkinakis banged your girlfriend," he said. "Sorry to tell you that, mate".
Two-time Grand Slam winner Wawrinka was furious with Kyrgios after the Montreal Masters meeting, taking to Twitter after the match to urge the ATP to take action against the 19-year-old.
But it's not the first time Kyrgios has been in trouble. Here, we take a look at his past indiscretions...
Nick Kyrgios: His most controversial momentsShow all 10 1 /10Nick Kyrgios: His most controversial moments Nick Kyrgios: His most controversial moments Nick Kyrgios controversy In the same year as stunning Rafael Nadal in the fourth round of Wimbledon 2014, Kyrgios was penalised an entire game after being slapped with a third code violation in a single match. Since breaking onto the scene the young Australian has been persistently warned about his language.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy During his first-round match at Wimbledon 2015, Kyrgios was heard saying 'dirty scum'. He had to defend himself after the win over Argentinian Diego Schwartzman, insisting the words were not aimed at the umpire but himself.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy During a match with Milos Raonic, Kyrgios was given a code of conduct warning after throwing his racket into the ground with so much force it bounced over a fence and into the arms of a spectator at the All England Club.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy In the same match against Raonic, Kyrgios confronted a fan in the crowd. 'I thought she said something like, 'Pull your head in'. She started laughing. I didn't really find it funny,' he said after the match. 'It's easy when you're just sitting there and you're just watching, when you've got no experience at all on the court.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy Kyrgios became an ambassador for headphone company Beats By Dre - but even that caused a stir. The marketing was titled Play By Your Own Rules, highlighting Kyrgios' lack of respect for the traditional etiquette of the game - something which irked some tennis fans.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy After being called out by a line judge for bad language at Wimbledon this year, Kyrgios remonstrated with the umpire. 'What did he just say to you? Does it feel good to be up there in that chair? Does it make you feel strong?' he said.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy The Aussie encouraged fans to smear Vegemite and other spreads on their faces after one supporter offered to do so. The trend, which seemingly started as a bit of fun, took a turn amid suggestions the gesture could be seen as 'blacking up'. Serena Williams said she would be interested to know why the fans did it.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy Against Richard Gasquet at Wimbledon, Kyrgios appeared to give up playing entirely after a couple of calls went against him and being warned by the umpire for an audible obscenity. With his opponent serving, Kyrgios hardly bothered to try and return. He lost the match.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy Olympic swimming champion Dawn Fraser claimed Australia's young tennis stars should set a better example or 'go back where their parents came from'. She later apologised whilst Kyrgios labelled her a 'blatant racist.
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Nick Kyrgios: His most controversial moments Nick Kyrgios controversy At the Montreal Masters he told opponent Stan Wawrinka that Thanasi Kokkinakis 'banged your girlfriend'. Wawrinka was furious with the sledge and urged the ATP to take action.
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Kyrgios retired from his match against Wawrinka, despite leading in the third set.
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