Marc Marquez completes his total domination of the Austin MotoGP weekend with a comfortable win over team-mate Dani Pedrosa, a repeat of last year's result.
The fight for third was closer with Andrea Iannone holding the final podium place for much of the race before Stefan Bradl and Andrea Dovizioso burst past with six laps to go.
Dovizioso, Bradl and Bradley Smith then spent the closing stages dicing for third. Struggling with 'flu, Dovizioso clung on to claim Ducati's first MotoGP podium since 2012.
Dovizioso's team-mate Cal Crutchlow pitted for a new rear tyre then suffered a big accident at turn two and was immediately seen removing his glove and checking his right hand before being carried away on a stretcher.
Jorge Lorenzo's 2014 race misery continued when he made a massive jump start and was forced to serve a ride-through penalty. Marquez then led the remainder of the race - although he gave the Repsol Honda team a scare with a sideways moment under braking at the very final turn!
1. Marc Marquez
ESP Repsol Honda Team (RC213V) 43m 33.430s
2. Dani Pedrosa
ESP Repsol Honda Team (RC213V) 43m 37.554s
3. Andrea Dovizioso
ITA Ducati Team (Desmosedici) 43m 54.406s
4. Stefan Bradl
GER LCR Honda MotoGP (RC213V) 43m 56.220s
5. Bradley Smith
GBR Monster Yamaha Tech 3 (YZR-M1) 43m 56.393s
6. Pol Espargaro
ESP Monster Yamaha Tech 3 (YZR-M1)* 43m 59.997s
7. Andrea Iannone
ITA Pramac Racing (Desmosedici) 44m 1.687s
8. Valentino Rossi
ITA Movistar Yamaha MotoGP (YZR-M1) 44m 18.949s
9. Aleix Espargaro
ESP NGM Forward Racing (Forward Yamaha) 44m 21.035s
10. Jorge Lorenzo
ESP Movistar Yamaha MotoGP (YZR-M1) 44m 22.541s
11. Nicky Hayden
USA Drive M7 Aspar (RCV1000R) 44m 34.165s
12. Hiroshi Aoyama
JPN Drive M7 Aspar (RCV1000R) 44m 37.384s
13. Yonny Hernandez
COL Pramac Racing (Desmosedici) 44m 40.763s
14. Karel Abraham
CZE Cardion AB Motoracing (RCV1000R) 45m 1.402s
15. Hector Barbera
ESP Avintia Racing (Avintia) 45m 5.806s
16. Michael Laverty
GBR Paul Bird Motorsport (PBM-ART) 45m 5.973s
17. Danilo Petrucci
ITA IodaRacing Project (ART) 45m 12.606s
18. Mike Di Meglio
FRA Avintia Racing (Avintia)* 45m 25.392s
GBR Go&Fun Honda Gresini (RCV1000R)* DNF
USA NGM Forward Racing (Forward Yamaha) DNF
GBR Ducati Team (Desmosedici) DNF
ESP Go&Fun Honda Gresini (RC213V) DNF
AUS Paul Bird Motorsport (PBM-ART)* DNF
Blue Name = Factory - Control ECU hardware, unique manufacturer software.
20 litres of race fuel, 5 engine changes for the season. All engines identical throughout the year within the same team (development freeze).
Black Name = Factory (with concessions) - Control ECU hardware, unique manufacturer software.
Applicable to Factory entries by a manufacturer that did not achieve a dry win in 2013 (only Ducati) plus any new MotoGP manufacturers.
Same 24 litres of race fuel, 12 engine changes, softer rear tyre, no engine development freeze and extra testing opportunities as the Open Category. Fuel to be reduced to 22 litres should Ducati achieve a race win, two second places or three (dry) podiums. If Ducati claims three wins they will also lose the softer rear tyre. All other concessions confirmed until start of single ECU era in 2016.
Red Name = Open - Full control ECU system, hardware and software.
24 litres of race fuel, 12 engine changes, softer rear tyre, no engine development freeze and greater testing opportunities relative to Factory.