One thing you have to give credit to Chisora for is being able to take a punch. The guy is tank.

He took licks from Vitali for 12 rounds and then later that night took a full blown hook to the face, with no gloves, while holding a bottle, by Haye.

I can't see Haye knocking Chisora out.

But then for all Chisora's ruggedness, I don't think he has knockout potential in him either.

The truth it is a battle of two losers, I think most the fight will be Chisora coming forward and pressing, with Haye retreating and hitting on the run. Haye will probably win, landing the clearer punches. But many people will be equally as convinced that Chisora won simply through being more aggressive.