|Vitali Klitschko was disgusted by the behaviour of Chisora before and after their last fight [GALLO/GETTY]
WBC heavyweight champion Vitali Klitschko said he wants to fight British boxer Dereck Chisora again - so he can knock him out.
Klitschko knows he doesn't need a rematch, "but my ego, something deep inside, tells me quite clearly that I still need to give this man real punishment,'' he told Tuesday's edition of Die Welt newspaper.
"I want to knock him out in the ring. This account is still open,'' he said.
However, Klitschko's manager Bernd Boente has ruled out a rematch. Klitschko beat Chisora on points in Munich on Saturday night, but the win was overshadowed by the challenger's conduct outside of the ring.
"Before the fight I still thought that how he was presenting himself, how he behaved, was a show. But then I realised he wasn't acting."
It culminated in a post-fight brawl with former WBA champion David Haye, for which the 28-year-old has apologised.
"I saw everything from the podium. I thought I was in the wrong film,'' Klitschko said.
"You can't behave like this, neither in a sporting way nor as a person. It was below the bottom drawer."
Chisora slapped Klitschko at their weigh-in on Friday, and spat water in younger brother Wladimir's face before the bout.
"Before the fight I still thought that how he was presenting himself, how he behaved, was a show. But then I realised he wasn't acting. He must be crazy. When I think about all he's done... then he threatens to shoot someone, to kill. How can you be like that as a person? Unbelievable. I cannot believe it.
"Everything I had to do with him seems like a nightmare."
German police want to speak to Haye about the incident but may have to wait as the former WBA heavyweight champion posted a picture of himself on Twitter in a first-class aeroplane seat on Tuesday, reportedly on his way to Las Vegas.
"Jetting off to warmer climates. Its PARTY TIME!'' Haye tweeted.
Klitschko partially tore a ligament in his left shoulder during the fight, but said he would "never" have given up against Chisora.
"I'd rather have died than to give him anything,'' he said.
The World Boxing Council fined Chisora a reported $50,000 for the slap, and Klitschko said any further punishment "has to really hurt. It can't be that this lout drags the sport of boxing into such disrepute."
The 40-year-old said he had no immediate plans to retire and that he still has dreams to realise. He did not say what those dreams are.
"I'm superstitious and believe that when you speak of dreams before they're realised, they won't come true,'' he said.
Klitschko harbours political aspirations in his native Ukraine, where parliamentary elections will be held in October.
"For now I am concentrating on Wladimir's title defence and getting back to full health as quickly as possible,'' he said.
Wladimir Klitschko was declared 'super' WBA champion after beating Haye in Hamburg last July and will defend the belt, and the IBF, WBO, IBO titles, against Jean-Marc Mormeck of France in Duesseldorf on March 3.
The older Klitschko said Chisora and Haye were "both cut from the same cloth," but he did not categorically rule out a muted bout against the latter.