The 38-year-old crashed while training at the Cross Club Cavallara track, suffering mild chest and abdominal trauma, and was subsequently taken to hospital in Rimini, where he remains in observation.

A Yamaha statement however stated that "no fractures have been detected in any part of the body and no serious traumatic pathologies were found."

It's currently unclear whether Rossi's participation in next weekend's Mugello MotoGP race could be thrown into doubt.

Yamaha will release a further statement on Rossi's condition at 1200 CET on Friday.