I'm not convinced that Serguei will win the fight against Briggs for a start, Briggs is quite a bit bigger than him and has a fair punch, so if it does end early, I reckon that it will go to Briggs. However, Lyakovich will have to do what Maskaev did if he wants to win, if he covers up and hangs on for the first 6 or 7, dodges the big hits, has the stamina, and doesn't leave his chin too open, then as Briggs tires, as a man of his size inevitably will, then Serguei tees off and starts to knock him about. It's a closer fight than you think fan4life, and I'm gonna drop on the side of Briggs, cause he does have the big size and reach difference.

As for Valuev, I think they both could do pretty well against him, but the Russian giant would beat both of them in my view. He has better conditioning and stamina than Briggs, and Lyakovich would find it impossible to get past his big arms and guard.