Klitschko pulls out of Chisora bout

Wladimir Klitschko has pulled out of his world heavyweight title defence against Dereck Chisora for the second time – fuelling speculation he is set to fight David Haye instead.

Ukrainian Klitschko had previously postponed a December defence of his IBF and WBO belts against Londoner Chisora through an abdominal injury and has done so again, citing an unsatisfactory recovery from the problem.