AMSTERDAM (AP) — Defending MotoGP champion Jorge Lorenzo broke his left collarbone in a high-speed crash on a rain-slicked track during practice for the Iveco TT in Assen on Thursday.
Lorenzo, second in the standings behind fellow Spaniard Dani Pedrosa, lost control of his Yamaha in afternoon training and was thrown off the motorbike on the Hoge Heide straight.
He slid on his back along the soaked track before coming to a standstill on grass. He got up and gingerly held his left arm before being driven away in an ambulance.
Race organizers said he would fly to Barcelona and undergo surgery there on Friday.
The injury dents Lorenzo's hopes of retaining his title after he put himself in contention by winning three of the last six races.
He had earlier powered to the fastest lap in morning practice before the arrival of showers that are forecast to plague Assen over the race meet, including on race day on Saturday.
Marc Marquez posted the fastest time in the wet, lapping the track in 1 minute, 47.617 seconds on his Honda. Valentino Rossi was second and MotoGP championship leader Dani Pedrosa was third fastest.