Lance Armstrong versus Alberto Contador, a battle royale. Their rivalry started during the 2009 Tour de France, when it became clear both men were vying for the ultimate win, despite being on the same team. This year, Amstrong will ride for the team he created, Team RadioShack, while Contador will ride for Astana once again, without Johan Bruyneel and a lot of his former teammates. Check out the video above, from Versus, to see the history of the rivalry between the two big stars of the upcoming Tour de France. And pick up a copy of our July issue for more on Lance Armstrong and the rules and controversy of the Tour.