He retired of his own accord He would have continued, but was fed up of not getting any decent paydays since nobody would take the risk after he upset Haye's applecart. At 41 he thought he might as well call it a day if he ain't gonna get the bucks
He said he'd fight again, but wanted a decent payday. He obviously wasn't offered what he wanted. Shame a re-match with Haye never happened.