Dominant Klitschko knocks out Pulev to retain IBF crown (Reuters)

HAMBURG (Reuters) – World heavyweight champion Vladimir Klitschko knocked out Bulgarian challenger Kubrat Pulev with a fierce left hook in the fifth round on Saturday to retain his IBF title and end his opponent’s unbeaten record. The 38-year-old Klitschko, who also holds the WBO, IBO and WBA titles, knocked down the 33-year-old twice in the opening round as Pulev initially struggled to keep his taller opponent at a distance. The Bulgarian, who had won his previous 20 fights, was again floored in the third round when he was sent sprawling by a thundering left hook. …