KSI shoved Joe Fournier to descend their face-off into chaos – with security forced to step in ahead of the fight.
The YouTube, music and crossover boxing star returns tomorrow night at Wembley Arena against Fournier.
KSI shoving Joe Fournier at their press conference
But tempers threatened to boil over when the two came head-to-head just days before they are due to share the ring.
The rivals went nose-to-nose – bumping foreheads – before breaking away to pose for pictures.
But suddenly, KSI shoved Fournier, which forced security to get in between them.
KSI, 29, returns in the biggest test of his career against the nightclub tycoon-turned 9-0 boxer
And Fournier, 40, insisted the social media sensation is feeling the pressure of the moment and lashing out was evidence to that.
He said: “I think he’s scared and insecure, he’s not been there with a real fighter before.
“I think his emotions are boiling over which is exactly the strategy we want, we want him coming out swinging.
“That makes even bigger mistakes earlier on and we’re not trying to be here all night, we’re trying to get him out of there in the first round.”
KSI vs Joe Fournier: UK start time, live stream, TV channel and all you need to know ahead of Misfits 007
KSI last fought in January, knocking out gamer Faze Temperrr, 29, to take his record in the ring to five wins and one draw.
Fournier meanwhile has not boxed in a professional capacity since 2017 but faced musician Reykon and ex-heavyweight champion David Haye in 2021.
But the businessman and boxer claimed he is in the best shape of his life – partly due to cutting out SEX in training camp.
Fournier revealed: “I couldn’t be any better. I’ve sparred the best guys I could find, I’ve trained twice a day.
“I’ve stopped the alcohol for six weeks, I stopped the shagging for a month – which was very difficult for me!
“And yeah, I’m focussed, I’m ready and I really want to win, actually.
“That’s the reality, from the bottom of my heart I really want to win this fight, because it could be my last one.
“It could be the one I retire off, so let’s go out with a bang, Wembley Arena, West London where I grew up.”
Businessman-turned boxer Joe Fournier