Jorge Lorenzo suffered a fractured left collarbone which will rule him out of the Assen TT after a huge crash in a wet second MotoGP practice session.
The Spaniard, victorious in the past two grands prix, crashed early on when he fell foul of a combination of white lines and standing water heading into the sixth-gear Turn 13. Lorenzo was flung over his handlebars and appeared to land on his left shoulder, which he then seemed to be nursing as he walked to the ambulance.
Race officials confirmed shortly after the checkered flag that Lorenzo had suffered a collarbone fracture. He will now miss Saturday's race at the Dutch circuit, instead staying in hospital for observation before flying to Barcelona for surgery on Friday.
Lorenzo is currently seven points behind MotoGP championship leader Dani Pedrosa in the standings. The 26-year-old did not finish last year's Dutch Grand Prix after being wiped out by Alvaro Bautista at Turn 1, but went on to clinch a second MotoGP crown, 18 points ahead of current points leader Dani Pedrosa.