British boxer, Dereck Chisora, has slapped heavyweight champion, Vitali Klitschko, at the weigh-in for their world title fight on Saturday.
Klitschko did not retaliate as the two men were pulled apart but vowed to take his revenge inside the ring in Munich.
“He hit me not like a boxer but like a woman, with an open hand,” said the World Boxing Council champion.
“If he wants to fight properly, he must do that with his fists. I’ll be hitting him back tomorrow, in the ring.”
Chisora, 28, is a big underdog going into the fight after suffering two high-profile losses in his last three fights.
Ukrainian Klitschko, 40, added: “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.”
Chisora’s trainer, Don Charles, said his fighter’s actions were “totally unacceptable.”
“I’m speechless,” he said. “I’m with him 16 hours of every day and I didn’t see that coming. It’s totally unacceptable.”
“Somehow, Klitschko refrained from hitting back,” said Costello. “He looked shocked. It has never happened to him before.”
Chisora insisted on Thursday he would take Klitschko’s title.
“I will end the Klitschko reign and cause a massive upset,” said the Londoner. “It is the end for Vitali, I promise you.”
Promoter Francis Warren, representing his father Frank’s company, said: “We’re all scratching our heads about it, to be honest.