World champion Marc Marquez claimed a dominant victory from Honda team-mate Dani Pedrosa in the Grand Prix of the Americas in Texas.
The Spaniard, 21, led from pole and crossed the line 4.124secs ahead despite breaking a leg two months ago.
Marquez said: “The start was very good and after that my lead was such that the race was a bit boring.”
He now leads by 14 points after two rounds of MotoGP 2014 after winning the season’s opener in Qatar last month.
Marquez making history
Youngest winner of premier class championship
First rookie to win the title since Kenny Roberts in 1978
Youngest winner of a premier class race – 20 years two months and five days (Circuit of the Americas 2013)
The Honda bikes finished over 20 seconds in front of the field and it was the battle for third that proved most exciting for spectators, with Italy’s Andrea Dovizioso (Ducati) finishing ahead of Stefan Bradl (Honda) and Britain’s Bradley Smith (Yamaha).
Second-placed Pedrosa said: “Marc was a little too fast for me. He was three-tenths of a second faster per lap and there was no part of the track I could close him up.”
It is the first time a rider has won the first two MotoGP races of the season from pole since Australian Mick Doohan in 1995.
Britain’s Cal Crutchlow was stretchered from the track after coming off his Ducati on lap 12 and his manager later said that he may have broken his right hand.
Spain’s Maverick Vinales took the Moto2 race from Pons Kalex team-mate Esteve Rabat, with Australia’s Jack Miller on a KTM winning his second successive Moto3 race of the season.
Grand Prix of the Americas MotoGP results:
1. Marc Marquez (Spain) Honda 43:33.430
2. Dani Pedrosa (Spain) Honda 43:37.554
3. Andrea Dovizioso (Italy) Ducati 43:54.406
4. Stefan Bradl (Germany) Honda 43:56.220
5. Bradley Smith (Britain) Yamaha 43:56.393
6. Pol Espargaro (Spain) Yamaha 43:59.997
7. Andrea Iannone (Italy) Ducati 44:01.687
8. Valentino Rossi (Italy) Yamaha 44:18.949
9. Aleix Espargaro (Spain) Yamaha 44:21.035
10. Jorge Lorenzo (Spain) Yamaha 44:22.541
11. Nicky Hayden (U.S.) Honda 44:34.165
12. Hiroshi Aoyama (Japan) Honda 44:37.384
13. Yonny Hernandez (Colombia) Ducati 44:40.763
14. Karel Abraham (Czech Republic) Honda 45:01.402
15. Hector Barbera (Spain) Avintia 45:05.806