Joe Calzaghe & Mikkel Kessler, undefeated Super Middleweight champions will finally meet to unify their titles & answer the burning question: Who is the best 168-pound fighter in the world? Joe Calzaghe, undefeated in 43 contests & the WBO champion since 1997, is recognised as the world's leading super middleweight & is defending his WBO title for a record 21st time, looking to add the WBC & WBA belts to his name. Mikkel Kessler, 28, unbeaten in 39 contests, has successfully defended his title four times & defeated WBC champion Markus Beyer to unify the titles.