Suzi Perry presents coverage of the tenth round from Germany, with motor sport's two-wheel prodigy, Casey Stoner, continuing his title challenge against seven-time world champion Valentino Rossi. With defending world champion Nicky Hayden struggling this season, 21-year-old Australian Stoner has emerged as the main threat to Italian Rossi. A crowd in excess of 200,000 will cheer on their latest duel at the Sachsenring in Saxony. Commentary from Charlie Cox and Steve Parrish. Show less