London, Feb 22 : WBC heavyweight champion Vitali Klitschko has branded heavyweight boxer Dereck Chisora as `sick in the head' following his reprehensible broil with David Haye.

 Klitschko's victory over Chisora was put in the shade by a brawl between the British pair of Chisora and Haye in the post-fight press conference.

 "I saw it all from the podium and I thought I was in the wrong film. Sooner or later, such a guy will get his comeuppance. You cannot behave like that,"

 The Sun quoted Vitali, as saying. "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," he said.

Vitali said Chisora's misdeeds are shocking and he can't imagine any human behaving in such a way.

 "When I consider everything that Chisora has done, slapping me around the face before the fight, spitting at my brother 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?" Vitali said.

 "It''s incredible. What goes through this guy''s head? Everything I have experienced with him seems like a nightmare," he added.

 Klitschko has offered Del Boy the chance of a rematch so that he can punish him more. He added: "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."

"I would like to knock him out in the ring. I still have this score to settle," he said. (ANI)