Marlboro Ducati's Valentino Rossi has been forced to withdraw from another day's testing on the 2012 Desmosedici MotoGP bike after he injured the little finger on his left hand in the first-lap Motegi crash.

Rossi went down after colliding first with Yamaha's Jorge Lorenzo and then with Ben Spies which also pushed the American into the gravel trap at turn three of the Japanese circuit last Sunday. Nicky Hayden will take over testing duties at Jerez tomorrow.

"Due to the severity of the pain and swelling in his left hand, the Italian on Tuesday underwent additional X-rays that revealed a hairline fracture at the arthrodesis of the first and second phalanx (performed following a fall at Assen in 1995) of the pinky finger on his left hand. Rossi’s participation in the Australian Grand Prix on October 16 is not in doubt," said a team spokesman.