George Kambosos weigh-in with Devin Haney descends into mayhem

Aussie challenger George Kambosos Jr and American champion Devin Haney had to be separated after an all-in brawl almost broke out during wild scenes at their Melbourne weigh-in on Saturday.

The Aussie fighter presented in supreme physical condition at an explosive, chaotic weigh-in for Sunday's world lightweight title rematch at Rod Laver Arena.

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Kambosos initially failed to make weight before his first fight against Haney but there was no such drama this time around as he tipped the scales at 134.08 pounds (60.82kg) - easily under the 135-pound (61.24kg) limit.

Instead, the drama erupted after an intense final face-off between the pair, with both men pushing and shoving one another while posing for photos in front of the gathered masses.

Kambosos and Haney had to be pulled apart and the two entourages almost came to blows in ugly scenes that promoter Lou DiBella conceded were "a little out of control".

Foul-mouthed Haney supporters taunted the Kambosos camp with expletive-laden taunts including "Your mother's a b*tch" while the US fighter's father Bill stoked the fire with a crude middle-finger gesture.

Warning: the following video contains offensive language

DiBella also threatened to eject the world champion's travelling jeweller for aggressive behaviour towards a security guard and "trying to start a fight".

"You don't want to see that. It's very easy to go from that to something dangerous," DiBella said.

"There was nothing staged about that at all. That was real.

"That being said, this is a fight, a prize fight, and there's a lot of emotion, a lot of adrenaline here.

"So it's not shocking and ultimately no one got hurt, thank God."

DiBella said officials would have "security everywhere to make sure nothing like that happens again" on Sunday.

"That being said, I think there's going to be a lot more passion in this fight. I think we'll see a better fight.

"And, look, I think George is ready to fight this time. I don't think he was last time but he's ready this time."

George Kambosos Jnr 'ripped and ready' for rematch

Kambosos (20-1, 10KO) initially missed weight on the eve of his first stoush with Haney (28-0, 15KO) before suffering his first professional defeat in a unanimous points decision at Marvel Stadium.

The Sydney-born fighter seems a different beast this time around as he aims to become the first Australian in boxing's 18-year, four-belt era to unify a weight division by stripping Haney of his IBF, WBA, WBO and WBC straps.

"I'm ripped and ready," Kambosos said. "We put in the work. That's a statement right there. We'll make a statement tomorrow."

"I haven't shown too much in this camp but I'm gonna show it all tomorrow.

"We are ready and whatever he brings ain't enough."

Haney hit the scales at a slightly heavier 134.81 pounds (61.15kg), with DiBella predicting a show-stopper after Kambosos was completely outboxed in suffering the first loss of his career in June.

"He looks completely different. He's in good shape," the promoter said.

"Will it matter? I don't know. Devin is a defensive genius but George knows what he has to do."

Kambosos last month declared Sunday's showdown "do or die" and said he'd likely retire if he lost again.

But the 29-year-old has since ruled out such a drastic move.

"Three world title fights in a row, I'm a role model to the world of boxing," Kambosos said.

"Love me or hate me, within a year three undisputed fights. Back to back to back and I'll continue this trend. I give my blood for this sport and, as long as I can do it, I will fight at the highest level and beat the highest level."

with AAP

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