Six-time MotoGP champion Marc Marquez has had a third operation on his right arm to put in a new plate, his Repsol Honda team said in a statement on Thursday.
The Spaniard fractured his right humerus in the season-opening Spanish Grand Prix in Jerez in July, and he had a second operation after damaging a plate in the arm while opening a window at home.
He subsequently missed the rest of the MotoGP season, failing to score a single point.
Honda said the latest surgery was undertaken due to the slow healing of the humerus "which has not improved with specific shock wave treatment."
The procedure lasted eight hours and was uneventful, the team said.
Honda did not say how long Marquez's recovery might take, but motorsport.com suggested he could be out for six months, which would mean missing the start of next season.
Qatar is slated to stage the opening race of the 2021 season on Mar. 28.