Tony Bellew may require surgery on a hand injury sustained during his stunning heavyweight victory over David Haye.
Few had tipped Bellew to triumph over his bitter domestic rival but the Liverpudlian secured an 11th-round stoppage, with Haye having continued despite damaging his Achilles in the bout at London's O2 Arena.
Bellew himself later said that he broke his hand early in the bout and the WBC cruiserweight champion posted on Twitter on Tuesday to say he had met with his surgeon.
And his promoter Eddie Hearn told Sky Sports that Bellew will be assessed in a few weeks before a decision will be taken on whether he needs to go under the knife.
"The concern is they might have to open his hand up and have an operation," he said.
"He's got to test it out in about three or four weeks, if it's still sore they're probably going to have to open the hand up and have some surgery on that.
"If that is the case he's probably going to be out for about five months, which doesn't affect things too much because really if we're looking at fights again, I keep telling him he's going to fight again but you never know, it will probably be October or November anyway so we're hoping he can try that hand out in a couple of weeks and it's not too sore.
"If it does need an operation he won't be back until November or December, I think that's the kind of the timeframe anyway."
Hearn added that a decision is still to be made on if Bellew, who may yet decide to retire, stays at heavyweight where a rematch with Haye, or bouts with Tyson Fury, Joseph Parker or Deontay Wilder are a possibility, or return to cruiserweight.
He added: "We've got a decision to make soon with his WBC cruiserweight championship, a belt he still proudly owns and of course you have all the other fights out there.
"Tyson Fury, Joseph Parker, Deontay Wilder, the David Haye rematch - all those are in play.
"It's my job to look at all those individually, present them to Tony and his family and see which one he wants to take."