Michele Pirro will replace the injured Danilo Petrucci in the second round of the MotoGP season in Argentina.
Petrucci was forced to abandon the season opener in Qatar after having broken the second, third and fourth metacarpals of his right hand in a crash during testing in Australia.
The Pramac Ducati rider is to undergo surgery again on Monday.
Pramac said Pirro will stand in for Petrucci in Argentina and in any future races his compatriot is forced to miss as a result of the injury.
Pirro already replaced Petrucci on the Ducati for the final test of the pre-season in Qatar.