David Haye insists the hatred of Dereck Chisora that has fuelled his training camp will be replaced by cold-hearted professionalism on Saturday night.
Five months of controversy, hearings, legal challenges and insults will come to an end when the sworn enemies collide in a fight that excites and repels in equal measure.
The shameful brawl in Munich that disgraced British boxing initiated a feud that will finally be settled at Upton Park, despite strong moral objections.
The hostility between the two is genuine and for Haye, who will enter the 10-round contest as a big odds-on favourite, the challenge is keeping his temper in check.
"It's fair to say I really don't like Chisora - I fought him for free in February - but there will be no emotion in the fight," he said.
"The fact I hate the guy so much has driven me on in training, but when it comes to fight night he must be seen as a slab of meet who will get pounded on, just like any other.
"Chisora's got one hell of a beating coming. I was looking at him this week and I can't want to put my fists in his face.
"He's not a nice guy and is someone who needs to be taught a lesson. I'll teach him because he's an idiot."
Haye will be conceding two and a half stones to Chisora, but mocks the conditioning of the 28-year-old, who looked fleshy at yesterday's weigh-in.
"Chisora's horrible to look at. You want to see an athlete in his physical prime, but he's never looked in his physical prime," he said.
"He always looks like he's skipped too many sessions or eaten too many Burger Kings.
"He will be weighed down by the excess fat hanging from his neck, arms, midriff and legs."
Opposition to the fight has been substantial and many find it unsettling that profit should be made from a public brawl that was investigated by German police.
Equally disturbing is the potential for crowd trouble at West Ham's Upton Park home given Haye's following among Millwall fans, despite Frank Warren dismissing fears of violence and the Metropolitan Police expressing approval of the security arrangements.
Where the British Boxing Board of Control will be left also remains to be seen with their refusal to sanction the encounter easily circumvented by having the anonymous Luxembourg Boxing Federation license the fighters.
And the confusion over the drug testing procedures in place is far from satisfactory.
Yet for all the car-crash appeal that has seen 30,000 tickets sold - nearly 5,000 more than attended Frank Bruno v Lennox Lewis in 1993 - it is a genuinely intriguing contest that has gathered greater credibility as it approaches.
Defeat for Haye would be catastrophic following his feeble performance against Wladimir Klitschko, doing irreparable damage to his legacy with public opinion having already swung against him for blaming his loss to Klitschko 12 months ago on a broken little toe.
Only a year ago the possibility of facing Chisora was unthinkable and it clearly rankles the former WBA world heavyweight champion that he must share a ring with someone he considers vastly inferior.
"For sure an impressive victory is the only way for me. I'm not just looking at a victory, I'm looking to be really spectacular in this fight," said the 31-year-old.
"I've had my fair share of great press but now I've got to take some negative press. As long as I'm getting press, I don't care one way or the other.
"As long as the people I care about and the people that know boxing know what I've achieved, that's all that matters. But it doesn't really bother me what other people think.
"Chisora riled me this week by actually thinking he belongs in the same ring as me, but people want to see us do battle for real."
While Haye is dismissive of Chisora, his trainer Adam Booth realises the potential for an upset.
Chisora's three successive defeats heading into the fight - all on points across 12 rounds - are misleading, particularly against Vitali Klitschko who he troubled throughout.
Lacking Haye's one-punch knockout power but durable with good stamina, his come-forward pressure style could ask the more elusive Haye plenty of questions.
"Against Vitali, Chisora showed a total disrespect and disregard for what was coming at him," Booth said.
"By the end of the fight it was Vitali who wanted the fight over. We won't be underestimating Chisora."