According to Eddie Hearn, promoter for Tony Bellew, his boxer is fully focused on one fight - a showdown with IBF, WBA, WBO, WBC cruiserweight world champion Oleksandr Usyk.
Last month in Moscow, Usyk dominated undefeated Murat Gassiev over twelve rounds to unify the four cruiserweight titles and won the World Boxing Super Series tournament.
After his victory, Usyk called for a first unified defense against Bellew.
After the call-out, Bellew went public and accepted the fight with open arms.
The date of November 10, in the UK, has been tabbed as the likely details of the contest.
Hearn indicates that Bellew is only willing to face Usyk or the former champion will contemplate retirement.
"[In the] next two weeks we'll know if it's happening - there is a good chance. Ever since Usyk called him out after the Series, Tony's had it in his head that he's fighting him. And it's the only fight that he will come back for. It's Usyk or retire. That's what it will be now. It's only really the Usyk fight that gives him the buzz," Hearn told Sky Sports.
"When you get an opportunity like this to be undisputed champion, something that he's dreamed of since he laced up a pair of gloves, he can't let it go. But this will be his last fight, I will make sure of that, and he will give every ounce if it happens. He's started now in camp, because if it's November, it's 11 weeks and he's got to get his weight down," Hearn said. "He's on that already. He was out in Portugal last week training, and he's in a good place."
Bellew has not made the cruiserweight limit since 2016.
Last March, he dropped the WBC cruiserweight title to fight domestic rival David Haye at heavyweight. After stopping Haye in eleven rounds, a rematch took place in May of this year, and this time Bellew stopped him in five rounds.
Usyk's promoter Alexander Krassyuk told Sky Sports: "We are very close to finalising the deal and announcing the fight. Most likely it will take place on November 10 in the UK.".