Dean Whyte, the brother of Dillian, has revealed the reason that sparked a backstage brawl between both Chisora and Whyte camps yesterday afternoon.
Both fighters met in Islington for the weigh-in before their rematch fight takes place at the O2 in London tonight.
As Chisora and Whyte both took to the scales, it was clear they had leaner physiques than previous fights.
The former has been training with David Haye in a bid to mould greater physical preparation and conditioning and weighed in at 17st 8lbs 3oz. While Whyte, who had been significantly stockier in a fight with Joseph Parker in July has dropped to 17st 8lbs 8oz.
With the pair squaring off in a tense stare down, Chisora began shouting obscenities in Whyte's face. Tensions rose and escalated as they both left the stage with Chisora's goading of Dean Whyte leading to a brief backstage clash.
"We couldn't really see what he had on his shorts and I was just looking at him [Chisora] and thinking he's in good shape. Then, he started to abuse me," Dillian's brother told iFL TV.
"I told him to tone it down, save the energy for the fight and said you're not fighting me, you're fighting my brother but he kept coming for me. He said something about sucking n*ts.
"I said we were doing so well, getting through the weigh-ins without problems but I think that was just a way to get to us. I think he maybe has some insecurities that he feels the need to lash out.
"I want him [Chisora] to just fight my brother tomorrow then I will deal with you donkey."
This is not the first time chaos has ensued between the two fighters. In the lead up to the last bout, Chisora risked the fight almost being cancelled by throwing a table at Whyte.
Two years ago, the duo battled it out in a savage fight and ended with a disputed split decision in Whyte's favour.
If the pre-fight animosity is anything to go by, it is safe to assume there will be plenty of fireworks tonight too.