Dereck Chisora would cause the biggest upset in boxing history if he defeats Wladimir Klitschko in their heavyweight title bout on April 30, the London fighter's promoter claimed Thursday.
Chisora is a massive underdog for his fight against the IBF and WBO champion in Mannheim, Germany, having won just 14 fights in his career compared to the experienced Klitschko's 55 victories.
''For a guy to win a heavyweight title after just 14 fights has to be the biggest upset of all time,'' said Frank Warren, Chisora's promoter.
''It would be a bigger upset than (Leon) Spinks beating (Muhammad) Ali because Spinks came in as Olympic champion. There are a lot of people out there who think this is a total mismatch, but they're wrong. He is going to give Klitschko a fight.''
Chisora originally had been scheduled to fight the younger of the Klitschko brothers on Dec. 11, but the Ukrainian pulled out because of an abdominal injury.
The British and Commonwealth champion was handed another shot at the two heavyweight belts when talks between Klitschko and Britain's David Haye, holder of the WBA belt, broke down this month.
Chisora is contracted to fight Vitali Klitschko if he beats Wladimir, and also has his sights set on Haye.
''Winning the world title after 14 fights would be amazing. My goal is to unify all the titles,'' Chisora said.
Chisora is undefeated while Klitschko has a 55-3 record, with 49 knockouts.
