RYAN GARCIA launched a foul-mouthed press conference rant before his fight with Devin Haney.
Garcia challenges for his first world title on Saturday in New York against long-time rival Haney.
But in the build up to the pay-per-view bout, the American, who has admitted struggling with his mental health in the past, has acted erratically online and in the media, causing concern over his wellbeing.
Garcia's behaviour showed no signs of changing just two days before the fight when he began trading verbal jabs with someone from the crowd.
He said: "Where's you mama at, baby? Where's your mum? Oh, I'm gonna go flirt with your mama, ooh.
London, New York and Europe welcome New Year; plus pics from around the world
"She's probably fine as f***. I want some of your mama, I want your mama now. Your mama probably in my DMs.
"Yeah, f*** you motherf***er. Don't talk before I f*** you up. Yeah, that fear coming in your mouth like a b***h.
"I'll put my d*** in your mouth, b***h."
Haney then interrupted: "Something is wrong with this motherf***er."
Earlier in the week, the two clashed during a photoshoot at the top of the Empire State Building.
CASINO SPECIAL - BEST CASINO WELCOME OFFERS
As a result, they were BANNED from throwing the first pitch at the Mets game amid fears of another heated incident.
The fighters also skipped the usual face-off to end the press conference and will instead go head to head at the weigh-in.
Haney's dad and trainer Bill threw doubt over whether Garcia would make the 140lb super-lightweight limit.
So Garcia agreed to a $50,000 bet that he will do so successfully.
Maisie Smith and Max George can't stop kissing in New York on sixth holiday
