valuev had no fear from the guy, thats why he allowed marcelo to get close. he would make more of an effort vs tyson to not get hit. wouldn't help him though, tyson would would be far too quick to avoid and the giant would be ko'd sooner or later.
Valuev height and weight stop him getting KTFO but he would dance a few times I reckon. Tyson could struggle with taller guys and the height disparity here would be large. Tysons speed advantage would be huge. I see it being an ugly fight where sugar has to hold a lot and lean to keep Mike tamed. Tyson on points
Altough to be fair Valuev was on his way out already by then. Had several medical problems at the time.
Plus, Holyfield shouldn't really have been in the ring with him. Valuev clearly tried to avoid hurting the old man out of respect. Holyfield was a living legend at that point. And SNV is a gentleman