Formula One: Triumphant Vettel closes on world title

YEONGAM, South Korea - Sebastian Vettel is within touching distance of a fourth world title in succession after he powered away from pole position to win a fiery Korean Grand Prix on Sunday.

Not even two appearances by the safety car, or the worrying sight of his team-mate Mark Webber climbing out of his burning Red Bull, was enough to stop the German's fourth win on the bounce.

The unstoppable Vettel took the chequered flag ahead of Kimi Raikkonen of Lotus, who just beat team-mate Romain Grosjean to the line for second.

Sauber's Nico Hulkenberg and Mercedes' Lewis Hamilton, who started second on the grid, were fourth and fifth.

Vettel's third win on the trot in Korea means he has racked up 272 points, a mammoth 77-point lead over nearest challenger Fernando Alonso of Ferrari, who came home sixth at Yeongam.

There are a maximum 125 points going begging in the five remaining races, starting in Japan next weekend.

The real battle on an overcast but dry afternoon next to the Yellow Sea was behind the 26-year-old Vettel, with Hamilton and Grosjean duelling for long periods for second.

Hamilton's Mercedes team-mate Nico Rosberg was also in the mix before a problem saw sparks dance spectacularly from the front of his car as he overtook Hamilton on lap 28.

An extended pit stop saw the German rejoin in midfield and he had to settle for seventh, with McLaren's Jenson Button eighth.

Felipe Massa of Ferrari and Sergio Perez of McLaren rounded out the top 10.

Vettel was already streaking away at the first hairpin, where there was early drama when Massa spun around, causing his team-mate Alonso to run wide with Button and the Force India of Adrian Sutil suffering minor damage.

The Brazilian Massa, who started sixth on the grid, found himself dumped down to the back of the field.

There was more drama on lap 31, when Perez saw a front-right wheel explode on the straight, catapulting rubber dangerously over the track and bringing out the safety car.

But no sooner had the safety car departed than it was back out on lap 38 when Sutil was again in the thick of it, appearing to spin and take out Webber.

The Australian's Red Bull glided off the circuit and went up in flames, but Webber - who qualified third but started 13th on the grid because of a penalty - clambered out safely.