Carl Froch will fight Mikkel Kessler for a second time in the UK at a date and venue to be announced, it was confirmed on Tuesday.
The first fight between the pair took place in Herning, Denmark in 2010 with Kessler claiming a points decision to hand the Briton a first career loss.
The re-match was highly sought-after by Froch and his promoter Eddie Hearn, who was delighted to confirm a deal was put in place before Tuesday's deadline.
Had terms not been agreed, IBF champion Froch would have had to face mandatory challenger Adonis Stevenson instead.
"This is one for the ages," said Hearn. "My hat goes off to both men for putting everything on the line here in what can only be an epic battle.
"Too many super fights fall by the wayside so to make Froch v Kessler 2 is a dream come true.
"Froch vs. Kessler 1 was a barnburner but I really feel Carl is a different fighter now, especially in the UK. These are the kinds of fights and nights that can cement the legacy of Carl Froch and no one deserves it more.
"We know what to expect from both men and either way it's going to be brutal."
Froch admitted he was delighted the fight had finally been agreed after such drawn out negotiations that started last year.
"First and foremost, I'm really pleased the fight has finally been arranged," said Froch. "I feared that Kessler had second thoughts about his promise - but the man has come good on his word.
"Our first fight was pure warfare. We went at each other for every minute of every round and the rematch promises to be even more fiercely contested.
"I seriously wish I was ringside myself for this fight, because I'm gunning for revenge at all costs and the fight fans are in for a real treat.
"He is a class act both inside and outside the ropes. We are cut from the same cloth and we will be friends yet again after the fight.
"But the moment I heard the fight was done on the telephone, I was completely switched on and he was the focus of my mind. I can't wait to get back into camp for this one. I've never felt so motivated.
Froch v Kessler fight outcome
Froch by KO
Kessler by KO
Froch on points
Kessler on points