Hungarian Zsolt Erdei upset champion Julio Cesar Gonzalez to win the WBO light-heavyweight title on Saturday.
Erdei claimed a unanimous points decision over his Mexican opponent to extend his unbeaten record.
Gonzalez was making the first defence of the title he won by beating Erdei's stablemate Dariusz Michalczewski.
Erdei could be a possible opponent for Welshman Joe Calzaghe should the WBO super-middleweight champion make the step up to light-heavyweight.
Calzaghe plans to move up a division after making the 14th defence of his WBO crown against Mger Mkrtchyan in Cardiff on 21 February.