Tony Bellew has the chance to end his career on a massive high by beating Oleksandr Usyk in Manchester on Saturday night.
The undisputed world champion will be in town defending his belts against the Bomber, who has dropped back down to cruiserweight following his two victories against David Haye.
The build-up to his bout with the Ukrainian has been nowhere near as hostile as what we witnessed ahead of the Haye fights.
Now that the animosity is over, however, and the "b**** from Bermondsey" - as Bellew liked to call him - has retired, he is in a very good position to comment on his old nemesis.
Haye believes the Liverpudlian has a good chance against Usyk, as long as he can utilise his powerful left hook.
"Solid counter punches, get Usyk reaching, get Usyk coming towards him. I definitely feel Tony Bellew's counter punching skills are very underrated," the 'Hayemaker' told Sky Sports.
"If Tony can land that left hook to the head, that left hook to the body, he can really get a foothold in this fight, and turn the tide."
Haye has his say on Bellew's physique
On Friday, the weigh-in will take place and the watching world will be keen to know how Bellew is shaping up, given his unconventional physique.
Usyk, on the other hand, always looks in fine shape. Yet, Haye does not think the British fighter's extra pounds will be a disadvantage.
"If he turned up shredded for the fight, I would think that something was wrong, to be honest," Haye added.
"He needs to focus on what makes him effective. He's got more of a smooth body shape, similar to Bernard Hopkins.
"Muhammad Ali was never shredded, but he goes down as one of the greatest heavyweights of all time, same as George Foreman, Joe Frazier.
"None of these guys were shredded, but they were all amazing fighters. And that's it. It's not a bodybuilding competition, it's a boxing match."
That could well be true, particularly as Bellew seems more likely to win if the fight doesn't go the distance - so he won't be aiming for 12 rounds.
He and Usyk are exactly the same height - 6'3" - but the latter comes out on top regarding reach, with 78″ compared to Bellew's 74″.
It's going to be an absolutely fascinating boxing spectacle.
Can Bellew cause an upset against Usyk? Have your say in the comments.