The six-time MotoGP world champion is undefeated since June and is rapidly closing in on another riders title.

Acosta, the one rider who had shown pace to match Marquez throughout practice, pushed too hard, too early. He lost it at the high-speed Turn 8 before he had even registered a lap time, and his factory KTM was a write-off after several cartwheels.

Marc Marquez now has the MotoGP world title in his grasp, while reigning champion Jorge Martin celebrated a fine fourth position