Matt Skelton will defend his British heavyweight title against compatriot Danny Williams on 16 July.
They meet in Bolton as Amir Khan makes his pro debut, with the winner possibly on for a world title tilt this year.
Williams beat American Mike Tyson last year before losing to Ukrainian WBC champion Vitali Klitschko.
"It's a great fight and one the British public want to see. They want to see the big men of boxing have a real fight and this will be a war," he said.
"He's a brawler and he hasn't got much boxing skill. But he's got a big heart, great conditioning and he'll come to fight.
"But I can handle it. I'm going to be in great shape. I don't really want to box him, I want to go to war with him.
"I just want to make it a really exciting fight. I believe I hit harder than him. I believe I'm better than him in every respect."
And the 31-year-old Williams said he will retire if he loses to Skelton.
"If I lose this fight, it's goodbye Danny Williams. There's nothing for me."
The 38-year-old Skelton was adamant his heart and work-rate will overcome Williams' greater experience.
"He's been in the game a lot longer and his technique should be superior," said the Bedford fighter.
"But all I know is how to fight and I get the job done. I may not look a million dollars but I get results."
Meanwhile, promoter Frank Warren called the contest "the biggest British heavyweight title fight in recent memory".
"This is a real fight for the fans and I'm delighted that it's on," he said.
"Skelton is the powerful raw puncher who has stopped all but one of his opponents and is stepping up to the plate.
"Danny is the man who destroyed Mike Tyson's myth once and for all and remember Tyson did not want a rematch with him.
"Both men can punch and it could be a case of who lands first can win.
"I've talked to (American promoter Don King) and the winner will be fighting for a world title before the end of the year."
Warren, whose promotions have been broadcast by Sky TV in recent years, also hinted that the fight could be on terrestrial TV.