In all honesty Valuev is one of the least skilled fighters in history. He is the living metaphor for this heavyweight division. Tyson murders his ribs and TKO's him in 7.
Prime Valuev would TKO Iron Mike in the 4th...just too much speed and head movement for Tyson to handle...Tyson's dangerous left hooks would totally be neutralized by Valuev's piston-like jabs.
The corpse of Holyfield won against Niky, but was robbed. Prime Tyson will win a easy UD. I respect Nikolai too much to say he will be knocked out, that guy got the heart of 10 bulls. But Tyson will win every second of every round. Widest UD in boxing history.