According to promoter Eddie Hearn, who handles Tony Bellew, his man wants the showdown with Oleksandr Usyk (15-0, 11 KOs) to take place at the cruiserweight limit of 200-pounds.
Last March, Bellew officially walked away from the WBC cruiserweight title for a lucrative fight with David Haye at heavyweight. Bellew stopped Haye in eleven rounds, and destroyed him in the rematch which took place on May 5.
Two weeks ago in Moscow, Usyk became the king of the cruiserweights after dominating Murat Gassiev to unify the IBF, WBA, WBC, WBO world titles in the World Boxing Super Series final.
Right after his dominating win over Gassiev, Usyk called out Bellew - and he doesn't care if the fight happens at heavyweight or cruiserweight.
While there are some concerns regarding Bellew's ability to get down to cruiserweight, the Liverpool star is eager to challenge for the undisputed crown at 200-pounds.
Hearn said to Sky Sports: "Bellew called me 20 minutes after [Usyk's] fight and said: 'I'll knock him out'. I told Usyk's team that a fight would have to be [at heavyweight] because that's where Tony is now, and he feels good.
"Tony told me: 'I want to fight him at cruiserweight because I want all the belts'. If he's going into a fight as risky as Usyk, he wants the biggest reward possible which is to be the undisputed cruiserweight world champion.
"People believe Usyk is pound-for-pound No1, certainly in the top three. So if Bellew beats him, what does that make Bellew? That's the madness of this. There is a very good chance of this fight happening. My job is to make it, because Bellew has asked me to."
Usyk's promoter Alexander Krassyuk of K2 Ukraine, confirmed that his side is in serious talks with Hearn: "We are in touch with Eddie now discussing the terms. We have the same goal delivering most expected fights for the boxing fans and I suggest Usyk vs Bellew is the one. We will meet soon and find the way to make it happen.
"I would prefer Usyk debuting in the heavyweights. But he is an undisputed [champion] in the cruisers so it is likely that fight might happen in cruiserweight division.
"Usyk wants the fight. I have a lot of respect for Tony, he is a brave and determined fighter who proved his skills and character in the last couple of fights. Bellew is an emeritus WBC champ, Usyk holds the regular WBC title. This fight should definitely take place."