Rossi expecting a 'difficult' race.
Valentino Rossi is expecting a 'difficult' race as he and the Yamaha team venture back to the United States for the first ever MotoGP round to be held at Indianapolis.
Stoner tells rival Rossi to get going Updated: 05:39, Saturday January 21, 2012 World champion Casey Stoner wants long-time rival Valentino Rossi to mount a serious challenge to his MotoGP crown after a lacklustre season left the Italian without a race win for the first time in his 15-year career.