At a combined 13 feet tall and 500 pounds, this is the biggest heavyweight championship fight in history, and the Sweet Science has a long history. Lewis, who has had a checkered career but only lost officially one time, takes on Grant, a highly touted contender from the Philadelphia suburbs who is coming off his defining fight, a late KO of Andrew Golota.

	Lennox Lewis was too big and quick for Evander Holyfield.

The 6-foot-5, 250-pound Lewis did connect with Holyfield throughout the rematch with crippling right uppercuts and thunderous overhand rights. Midway through the ninth round, Lewis landed a vicious right uppercut that buckled Holyfield's knees and sent him back to his corner at round's end on unsteady legs. Unable to match Lewis punch-for-punch, Holyfield battled in spurts, but in the end, Lewis' jab and big uppercuts gave him the undisputed title, though there was some dispute afterward about the decision. That's why Lewis taking on such a tough foe in his first fight since is rather odd.

It's hard to deny, however, that Lewis is the world's top heavyweight, more because there are no worthy challengers for the throne. That's where Grant comes in.

At 6-7, 250, Grant (31-0, 22 KOs) is a towering physical specimen, even bigger than Lewis. Grant is regarded as the best young heavyweight in the world and is recognized by most boxing insiders as the future of the heavyweight division. Grant has been plowing through the heavyweight division since his pro debut in 1994, and has knocked out six of his last seven opponents, including his last fight, which was a 10th-round TKO of Andrew Golota on Nov. 20 in Atlantic City. What Grant showed more than anything vs. Golota was heart. Knocked down for the first two times in his career in the first round, Grant fought back and eventually wore Golota down.

He'll be trying to do the same thing on April 29.