Tom Boonen vs Fabian Cancellara. A bike racing rivalry spanning over 15 years between two heavyweights of the cobbled classics. They have 7 monument wins EACH & over 200 professional race wins between them. Often described as the best of enemies; this rivalry was forged on 2-wheels but continued off it. Dan Lloyd is joined by Sean Kelly & Andy McGrath to defuse the seemingly inseparable riders, relive previous battles, and explore the off-bike drama. Celebrity stardom, victories shrouded in controversy, and illegal substances intensified the spotlight on the burning question: Who is the greatest?