Sebastian Vettel cruised to his 10th win of the season at the Korean Grand Prix, wrapping up back-to-back Constructors' World Championship titles for Red Bull in the process.
The German, who took the drivers' title last weekend in Japan, started second on the grid alongside Lewis Hamilton, but outbraked his McLaren into Turn 4 on the opening lap to take a decisive advantage.
A four-second lead was wiped out when Vitaly Petrov took Michael Schumacher out of the race at Turn 3, the resultant debris bringing out the safety car. But when racing resumed, Vettel was again able to pull away. His eventual winning margin over Hamilton was 11s.
Hamilton's runner-up spot was anything but easy. Mark Webber, in the second Red Bull, was never more than 1.5s behind him, and closed onto the McLaren driver's tail during the second half of the race.
A quick decision to bring Hamilton in for his final pitstop just as his rear tyres were beginning to go off managed to keep him ahead of Webber - who stopped on the same lap.
The Australian seemed to have more pace than the Briton, the pair running side-by-side for a number of corners on lap 34, and Webber eventually making it into second at the first corner with five laps to go.
Blessed with the superior traction of the McLaren, and employing a tactic of using all his KERS and DRS at the same time, Hamilton retook the position seconds later on the long run down to Turn 3, and held it to the finish, even setting the fastest lap on the penultimate tour.
Jenson Button fell from third to sixth on the opening lap following strong starts from Ferrari drivers Felipe Massa and Fernando Alonso. Such was Massa's lack of pace on worn tyres, that Nico Rosberg made it a four-way battle for the position as they approached the opening round of pitstops.
While Alonso dropped out of the battle after staying out too long on worn rubber, the action concerned Button and Rosberg, who pitted together on lap 14.
Rosberg got out ahead of Button, the Briton giving way at the pit exit after running side-by-side with the Mercedes driver down the pitlane, but then surrendered the position by outbraking himself and running wide as the rejoined the track.
Rosberg regained the place with the aid of DRS a few seconds later, but could only keep the McLaren behind him for another lap.
Massa, by this stage, had fallen behind the pair, and was also overtaken by Alonso at the second round of stops, after a couple of sensational laps from the Spaniard on old rubber.
Button and Alonso finished fourth and fifth, just behind the Hamilton/Webber battle, while Massa was next up.
Jaime Alguersuari put in another strong performance to finish seventh, the Spaniard passing Rosberg for the position on the final lap after a couple of unsuccessful earlier attempts, while his Toro Rosso team-mate Sebastien Buemi was one place further back.
Paul di Resta completed the points scorers, ahead of his Force India team-mate Adrian Sutil, while Pastor Maldonado - who was in the mix with the Force Indias behind the safety car, was given a drive-through penalty for hitting a bollard at pit entry, and later retired.
PROVISIONAL RACE RESULTS The Korean Grand Prix Korea Auto Valley, Yongam, Korea; 55 laps; 305.909km; Weather: Dry. Classified: Pos Driver Team Time 1. Vettel Red Bull-Renault 1h30:01.994 2. Hamilton McLaren-Mercedes + 12.019 3. Webber Red Bull-Renault + 12.477 4. Button McLaren-Mercedes + 14.694 5. Alonso Ferrari + 15.689 6. Massa Ferrari + 25.133 7. Alguersuari Toro Rosso-Ferrari + 49.538 8. Rosberg Mercedes + 54.053 9. Buemi Toro Rosso-Ferrari + 1:02.762 10. Di Resta Force India-Mercedes + 1:08.602 11. Sutil Force India-Mercedes + 1:11.229 12. Barrichello Williams-Cosworth + 1:33.068 13. Senna Renault + 1 lap 14. Kovalainen Lotus-Renault + 1 lap 15. Kobayashi Sauber-Ferrari + 1 lap 16. Perez Sauber-Ferrari + 1 lap 17. Trulli Lotus-Renault + 1 lap 18. Glock Virgin-Cosworth + 1 lap 19. Ricciardo HRT-Cosworth + 1 lap 20. D'Ambrosio Virgin-Cosworth + 1 lap 21. Liuzzi HRT-Cosworth + 3 laps Fastest lap: Vettel, 1:39.605 Not classified/retirements: Driver Team On lap Maldonado Williams-Cosworth 31 Petrov Renault 17 Schumacher Mercedes 16 World Championship standings, round 16: Drivers: Constructors: 1. Vettel 349 1. Red Bull-Renault 558 2. Button 222 2. McLaren-Mercedes 418 3. Alonso 212 3. Ferrari 310 4. Webber 209 4. Mercedes 127 5. Hamilton 196 5. Renault 72 6. Massa 98 6. Force India-Mercedes 49 7. Rosberg 67 7. Sauber-Ferrari 40 8. Schumacher 60 8. Toro Rosso-Ferrari 37 9. Petrov 36 9. Williams-Cosworth 5 10. Heidfeld 34 11. Sutil 28 12. Kobayashi 27 13. Alguersuari 22 14. Di Resta 21 15. Buemi 15 16. Perez 13 17. Barrichello 4 18. Senna 2 19. Maldonado 1 All timing unofficial