The Honda rider was recovering from an earlier off when he was flung from his machine at the Turn 3 left-hander at Jerez on lap 22, with Marquez landing hard in the gravel and the bike clattering into him. 
He had to be fitted with a neck brace and put into an ambulance to be taken to the circuit's medical centre, and was diagnosed with a fracture to his right humerus ...Keep reading

Source: Marquez undergoes successful surgery on arm injury