Vitali Klitschko has opened the door for a rematch with Dereck Chisora by claiming the Briton "still needs real punishment from me".
The Ukrainian retained his WBC heavyweight title with a unanimous points decision win in Munich on Saturday night, although the result was overshadowed by a brawl between Chisora and David Haye at the post-fight press conference.
Chisora, 28, was detained by German police the following day but released without charge, while Haye left the country before authorities were able to question him.
Both men broke their public silence on Monday, Chisora offering an unreserved apology for his part in the incident and Haye offering a lengthy explanation of his actions while stopping short of saying sorry.
It had been thought the incident would deter Klitschko from fighting either man, but the 40-year-old believes he still has unfinished business against Chisora.
"My brain tells me that I do not need a rematch, but my ego, deep inside me, is telling me in no uncertain terms that this guy still needs real punishment from me," he told Die Welt newspaper.
"I would like to knock him out in the ring. I still have this score to settle."
Klitschko, whose brother Wladimir beat Haye last July, said of the brawl: "I saw it all from the podium and I thought I was in the wrong film.
"Sooner or later, such a guy (Chisora) will get his comeuppance. You cannot behave like that.
"Even before our fight, I thought he was a showman, but then I understood that he was not acting - he must be sick in the head.
"When I consider everything that Chisora has done - slapping me around the face before the fight, spitting at Wladimir in the ring and then getting in a brawl at the press conference and threatening to shoot somebody - how can any human be like that?
"It's incredible. What goes through this guy's head? Everything I have experienced with him seems like a nightmare."
As for Haye, Klitschko added: "For him, the same as I said about Chisora."