Vitali Klitschko has vowed to take revenge on Dereck Chisora tomorrow after being slapped on the face by the WBC heavyweight title challenger "like a woman" today.
Londoner Chisora shamefully assaulted an unsuspecting Klitschko as the two posed for traditional head-to-head photographs after their weigh-in 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 tomorrow.
"I'll be hitting him back tomorrow, in the ring," he warned.
"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 this afternoon.
After weighing in at 241- 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 camp said they were unaware of the stunt beforehand, with trainer Don Charles even branding the slap "unacceptable".
Asked whether it was premeditated, the trainer added: "I'm not Dereck Chisora. Like I said, it's unacceptable."
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 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."
Chisora challenges Klitschko in Germany despite two high-profile losses in his last three fights.
Despite being a relative novice, he has already seen two clashes with Klitschko's brother Wladimir scuppered by the Ukrainian's injury withdrawals.
He was scheduled to fight the 35-year-old for the IBF and WBO belts in December 2010 before a stomach injury forced the champion to pull out and the rescheduled bout in April last year also fell through with Klitschko blaming a problematic rehabilitation.
While Wladimir went on to beat David Haye instead, Chisora remained at domestic level and lost his British and Commonwealth titles to Tyson Fury.
Though he went some way to redeeming himself with a career-best performance against Finnish star Robert Helenius before Christmas, a controversial split decision ultimately saw him suffer a second career defeat.
The Zimbabwe-born Briton therefore takes on long-reigning heavyweight king Klitschko as a huge outsider, with some bookmakers pricing him as generously as 10-1 to dethrone the champion in his adopted homeland.
"I'm the underdog in this fight which is exactly how I like it because when I knock him out in the eighth round it will shock the world," said Chisora, who has a record of 15-2 (9KOs) and is ranked 14th by the WBC.
"I know I've got to go in there and do a job on him.
"I'm in tip-top condition and the best shape I've been in in my entire career, so I'm confident I'm going to smash Mr Vitali Klitschko to bits."