KSI and Logan Paul’s weigh-in descended into an ugly brawl between their teams.
The American’s trainer, two-time heavyweight world champ Shannon Briggs, clashed with three members of the Brit’s corner.
The 47-year-old first clashed with KSI’s English trainer Viddal Riley, as well as Riley’s manager Amer Abda
In the melee, Briggs appeared to shove Abdallah in the throat after a verbal exchange.
After both fighters came in comfortably under the 200lbs (14st 4lbs) limit.
The melee kicked off as both camps tried to leave the staging area.
Riley was seen being dragged away from the fracas but one of Matchroom boxing’s giant security team, while Briggs was ushered down the Los Angeles street until the situation calmed.
On the scales moments earlier, Paul beat KSI in the battle of the weigh-in, with the home fighter looking a rock-hard sensation at cruiserweight.
KSI, real name Olajide Olayinka Williams, weighed in at 193lbs while Paul was heavier but more toned at 199lbs or 14st 2lbs.
The Los Angeles-based powerhouse warned the Watford star that his trademark bandana will have to come off and his prominent forehead will not be protected by the headguards they wore in the original August 2018 clash.
After blowing a kiss to his mum, who was filming everything on her phone like the rest of the crowd, Paul said: “I am sick of the smack talk, it is time to let my fists do it.
“I walk around at 205lbs and I have weighed in at 199lbs, it was perfect for me.
“The bandana comes off tomorrow and I am going to beat on his big forehead”.
KSI, 26, almost predicted that Briggs would get caught up in a ruck on the scorching LA afternoon when he hit back.
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The Watford man said: “Logan should have beaten me in the first fight but he blew his last opportunity.
“My team is stacked and he just has a hype man in Shannon Briggs.
“He knows he is finished, he knows nothing about boxing. He does not understand the levels.”