Ryan Garcia has angrily confronted a heckler at the Devin Haney press conference.
Haney and Garcia had already clashed in a face-off on the rooftop of the Empire State Building in New York, after the former shoved his rival following a trading of insults.
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But on his latest press event alongside his bitter rival, it was actually an audience heckler who he let loose at.
Garcia was being heckled from the crowd, to which he began shouting in a foul rant: "Where is your Mum at? I'm gonna flirt with your mumma.
"She fine as f***. I want your mum now. Your mum is probably in my dms. F*** you mother f*****, don't talk about my Mum.
"I will f*** you up, that fear is coming in your mouth like a b****.
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"I put my d*** in your mouth, you b****. Pause no diddy."
It drew a surprised response from Haney who took to his mic and shouted: "There is something wrong with this motherf*****."
Garcia's rant was quickly shut down by the host, with his words drawing an audible gasp from the media in attendance.
The identity of the heckler is currently unclear, but the 25-year-old was clearly incensed with his inaudible comments.
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Warning: The video below contains strong and offensive language.
It is certainly not the first time that the fighters' actions have stunned fans, given his antics on social media.
The champion argued with Garcia during their launch press conference, where their feud became personal.
Although he will compete this weekend, his behaviour has even drawn the concern from his ex-wife who posted a concerned message on social media.
He has been cleared to compete on the night, after the WBC held talks with the commission to investigate his behaviour.
His rival Haney will be hoping to defend his WBC super-lightweight title against an opponent he has already fought six times in the amateur ranks.
And 'The Dream' has refused to be drawn into the antics of his opponent on fight week.
He said: “If anything I think I’m under his skin. You see all the antics and everything that he’s got going. But at the end of the day I’m a true professional; he’s a true professional, I hope.
“My main focus right now is the fight. Yesterday is yesterday. I’m focused on today, and excited for the fight.
“That’s not really for me to determine – how he’s approaching the fight.
“It’s business, at the end of the day. Outside of the ring we weren’t friends – we never were friends – so it doesn’t matter.
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"This fight is bigger than Ryan Garcia. It’s about me proving my greatness to myself and to the world. I don’t care less. If he’s overlooking me or not, it’ll show in the ring on Saturday."
Devin Haney vs Ryan Garcia will be live on talkSPORT from 4am on Sunday morning.
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