Lennox was not getting his ass kicked by Vitali, the judges all had it scored 3 rounds to 2 for Klitchko when the ref made the call to stop the fight in the 6th. There was not a single knockdown; that's hardly a lopsided beating. The other thing to consider is that Lennox won the last 2 rounds and there was no indication of things getting better for Vitali. Lennox adjusted for his height and started landing hard rights which openned 3 cuts that looked like menstruating vaginas on Vitali's face. Even if the ref didn't call it, I think Vitali would have gotten KO'ed within a few rounds. It sounds pretty silly to say something like, "If it wasn't for the TKO, Vitali would have won the fight."
Lennox is going out a champ near the peak of his game. He's beaten a generation of heavyweights and not ducked any contenders. For years people, including Tyson, ducked him.