Rossi needs time to adapt to Bridgestone
Valentino Rossi says he still needs time to adapt to the Bridgestone tyres following his switch from Michelin rubber.
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.