There is no rivalry in MotoGP more bitter than that between Valentino Rossi and Casey Stoner, more bitter even than the one between Wayne Rainey and Kevin Schwantz. It has been a constant element in their relationship since Stoner won his first MotoGP title in 2007 (ironically, Stoner named Rossi as one of his heroes on the t-shirt he wore to celebrate that championship), though hardly a surprise, as the two men are polar opposites in almost every respect, except for their prodigious talent. The rivalry has intensified over the years, stoked by a series of incidents (nicely outlined by the peerless Italian website GPOne.com recently), including the booing of Stoner by Rossi fans at Donington in 2008, the epic battle at Laguna Seca in 2008, and the war of words between the two in 2010, ahead of Rossi's move to Ducati....