Nope. Look at how they fought against the common opponet John Ruiz. Look how Roy refused to fight ANYONE else in the division than the slow cemented footed sloppy plodder Ruiz. Roy would have had his pea sized head shaked like a rattle from Valuev's punches. His glass would have been shattered badly, too much size difference. Every boxing fan knows Roy's heavyweight journey has been absolutely fraudolent.
Roy would have embarrassed him. Valuev couldnt punch and was probably the slowest fighter I've seen. Roy would have won every round, and posed almost no threat to Roy, who would get his punches in and get out, before the Russian would do a thing.