Ukrainian WBC heavyweight boxing champion Vitali Klitschko (R) lands a punch to British challenger Dereck Chisora during their title bout in Munich Saturday. — Reuters MUNICH – Vitali Klitschko retained his WBC heavyweight belt by unanimous decision over British challenger Dereck Chisora on Saturday. Chisora was later arrested by Munich police in the wake of his brawl with ex-champion David Haye at a post-fight press conference. Chisora found very little support from the sellout crowd of 12,500 after slapping Klitschko's face at the weigh-in on Friday, and ensured the ill-feeling continued when he spat in the 40-year-old's face as the champion's record was being called out. Klitschko's younger brother, Wladimir, who holds the IBF and “super” WBA titles as well as the minor WBO and IBO belts, acted as a buffer as Chisora continued to goad his opponent. Vitali was clearly incensed, but it took some time before he could assert control against the 28-year-old Briton's aggressive approach. His greater reach and experience made the difference. The judges scored it 118-110, 118-110 and 119-111. Klitschko improved his record to 44-2 (40 KOs) with the 10th successful defense of the title he won from Corrie Sanders in 2004. The Zimbabwe-born Chisora dropped to 15-3 (9 KOs) after his third defeat from his last four fights. German police detained both Chisora and his trainer Don Charles for questioning as they were preparing to board a plane back to the United Kingdom and later arrested the heavyweight boxer at Munich police headquarters. “Given the events of Saturday evening, a criminal investigation is required,” a spokesman for Munich police said. Chisora is suspected of grievous bodily harm and threatening behavior, the spokesman added, and police also want to speak to Haye before he leaves Germany. The British Boxing Board of Control has already indicated they will launch an investigation into events leading up to the ugly melee in Munich when Chisora was heard to repeatedly shout that he wanted to “shoot” Haye. Violence erupted in the post-fight press conference between Chisora and compatriot Haye. Haye, 31, was amongst reporters after working here as a pundit and branded Chisora “a loser”. The British fighter promptly left the head table at the press conference to confront Haye, who he dubbed “an embarrassment”. Thet pair traded blows as their respective trainers became involved. Adam Booth, trainer of Haye and working at the fight for BBC Radio, was left with a cut head, while Haye was seen brandishing a cameraman's tripod. Chisora was repeatedly heard shouting that he would “shoot” Haye during a barrage of expletives as the pair were separated by stunned on-lookers. Chisora had earlier explained why he slapped Vitali and said: “I signed to fight Wladimir but he didn't give me a fight (Wladimir Klitschko twice pulled out injured before fighting Haye instead of Chisora). “I was out of the ring for 18 months because of that. I told my mother that when I see one of those brothers he's going to get a slap. Vitali drew the short straw and it was him. “But I will also give Wladimir a slap and David Haye a slap if I see him.”” “I'm totally disappointed, it went a little too far, the sport of boxing shouldn't be like that,” Klitschko told the BBC after watching the fight between the two British boxers. “Bloody faces in the press conference... I'm really surprised.”