Hector Barbera has been ruled unfit to take part in the remainder of the Indianapolis MotoGP weekend after sustaining fractures to the '5th, 6th and 8th dorsal vertebrae' in a Friday morning highside (pictured).

The Pramac Ducati rider, who was attempting a return to action less than a month after breaking his left tibia and fibula, will be replaced by Toni Elias. Elias rode for Pramac at the previous Laguna Seca round and had been on standby at Indy in case Barbera was unable to ride.