Jorge Lorenzo will miss the Czech and Austrian MotoGP races as the Spanish rider continues his recovery from fractured vertebrae, his Honda team said on Wednesday.
Lorenzo, a three times MotoGP world champion and team-mate of championship leader and compatriot Marc Marquez, crashed during practice at Assen in the Netherlands last month.
Honda said Lorenzo planned to return for the British Grand Prix on August 25, with experienced German rider Stefan Bradl standing in as he did at this month's German Grand Prix at the Sachsenring.
Bradl was already due to ride in the Czech round as a wildcard entry.
"Jorge Lorenzo and the Repsol Honda Team have agreed it is best for Lorenzo to miss both the Czech and Austrian rounds to continue his recovery and avoid any further risk of injury," they said in a statement.