The WBO and IBF champion has back problems after a public workout on Wednesday and his US advisers Shelley Finkel announced, "Wladimir has withdrawn from the fight that is correct. He has torn a muscle in his back."
"It is not too serious though. He should be able to fight again within 60 days."
Promoter Frank Warren who is already in negotiation to re-schedule the fight said, "I was informed about an hour ago that Klitschko pulled a back muscle and he was out of the fight,"
"Dereck is very disappointed. He didn't believe it. He felt everything was fine. Three or four days before a title fight, most of the hard work is done."
