World heavyweight champion Wladimir Klitschko has postponed his IBF title bout with Kubrat Pulev. During sparring Wlad suffered a torn muscle fibre in his left biceps. The fight is now likely to be held before the end of the year in Hamburg. Klitschko will have to miss four weeks of training. “I am very disappointed the fight will not go ahead,” Klitschko said. “So far I have been in top shape and had a great training camp. I am sorry for my fans as well as my opponent Kubrat Pulev, who has surely prepared just as intensely.” A new date will be announced shortly.