DEFENDING MotoGP champion Marc Marquez continued his 100% record at the Grand Prix of the Americas as Maverick Vinales crashed out.
Repsol Honda rider Marquez, 24, has now won all five races at the circuit in Austin, Texas.
Vinales – who had won the first two races of the season on his Yamaha – crashed on the second lap.
His veteran team-mate Valentino Rossi now leads the standings after finishing second, with Dani Pedrosa third.
British rider Cal Crutchlow was fourth.
Rossi, 38, has won nine world championships but none since 2009. He has a six-point lead over Vinales, with Marquez in third.
Rossi was given a 0.3 second time penalty for clashing with Johann Zarco but still comfortably bought his Yamaha home in second place.
Marc Marquez (Repsol Honda Team) initially fought it out with teammate Dani Pedrosa for victory in the Red Bull Grand Prix of the Americas, before being able to break clear in the latter laps of the race to take his stunning fifth win in a row in Austin – his 11th straight win on US soil in an incredible statistic.
Valentino Rossi (Movistar Yamaha MotoGP) then put on a late charge to take second, with Pedrosa completing the podium – and former Championship leader Maverick Viñales crashing out early on.