Vitali Klitschko insists Dereck Chisora's ill-advised slap at yesterday's pre-fight weigh-in is evidence the WBC heavyweight title challenger is "afraid" ahead of tonight's bout.
Londoner Chisora assaulted an unsuspecting Klitschko as the two posed for traditional head-to-head photographs after getting on the scales in Munich.
Champion Klitschko, 40, did not retaliate as the two men were pulled apart. But the Ukrainian has vowed to punish the Briton at the Olympiahalle this evening.
"I'll be hitting him back tomorrow, in the ring," he said.
"He's not all there. Dereck is full of nervousness and I feel he is afraid, otherwise he would not have jumped back like he did.
"He hit me not like a boxer but like a woman, with an open hand. If he wants to fight properly, he must do that with his fists."
Chisora, 28, is a rank outsider for the contest and attempted to get under the long-reigning champion's skin yesterday.
After weighing in at 17st 3lbs - just a pound heavier than his lightest weight for a professional bout - Chisora butted heads before slapping Klitschko's face hard.
The two men were pulled apart with a furious-looking Klitschko, who had weighed in three pounds heavier, left with a red mark on the left side of his face.
Chisora's team said they were unaware of the stunt beforehand, with trainer Don Charles even branding the slap "unacceptable".
Asked whether it was pre-meditated, the trainer added: "I'm not Dereck Chisora. Like I said, it's unacceptable."
The WBC have reportedly vowed to fine Chisora US dollars 50,000, with president Jose Sulaiman branding the slap "an absolute disgrace".
Promoter Francis Warren, representing his father Frank's company, said: "We're all scratching our heads about it to be honest. "You always expect something from Dereck - he's a character. But it's usually something that winds people up or is a bit jovial.
"So for him to get physical and aggressive, unprovoked, is surprising. But at the end of the day I'm sure there's method to his madness and we'll find out if the madness has paid off tomorrow night."
Warren added: "I was very surprised (by the slap) though. I wasn't expecting it at all.
"I don't think anybody wants to see that but it's happened now, so we'll move on and look forward to tomorrow night."
Asked whether he expects sanctions against Chisora, Warren said: "That's up to the governing bodies to decide. If there are sanctions then I suppose we will find out in the next couple of weeks.
"I'll sit down and have a chat with Dereck about it but at the moment we're focused on tomorrow night.
"Dereck is obviously a fiery character and that has got him to where he is. He can react like that to situations but at the end of the day he is a boxer, a fighter. Let's focus on the fight."