Dereck Chisora slaps heavyweight champ Vitali Klitschko during weigh-in

Dereck Chisora, a British heavyweight contender, probably thought he wasn't getting enough respect from WBC heavyweight champion Vitali Klitschko before their title fight in Munich, Germany this Saturday.

So while the boxers were face-to-face at the weigh-in on Friday, the challenger slapped Klitschko across the face with his right hand.

Klitschko was stunned but did not retaliate.

FULL VIDEO

After Chisora— wearing a Union Jack bandana like a bandit's mask— was dragged away by officials and handlers, the champ— behind a red mark on his face—stared down Chisora and didn't mince words.

"I am going to hit back on Saturday," he said.  "He will get his beating."

Klitschko vowed to teach Chisora some proper British manners in the fight.

"He is from Great Britain," said Klitschko, " But he's lacking in appropriate manners."