That wraps up the action from Korea. There's a two-week break now before F1 returns to Asia for the inaugural Indian Grand Prix. We'll of course be live for that one from first free practice!
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Rosberg and Alonso have parked their cars - they didn't have much fuel left!
Webber's third place means Red Bull have won the constructors' championship.
An interesting race, and a coronation of sorts for the champion, who won the title with a third position in Japan last week.
Alguersuari has got past Rosberg on the final lap! He takes 7th, Rosberg 8th, Buemi 9th, Di Resta 10th.
The rest come though - Hamilton, Webber, Button, Alonso, Massa
VETTEL WINS IN KOREA! 20th career win for the German!
Button locks a wheel trying to hold off Alonso, but he has room to spare.
It looks like Hamilton has got enough room now to hold off Webber to the end.
Hamilton sets the fastest lap of the race on the penultimate lap!
Alguersuari gets down the outside of Rosberg into turn three, but once again Rosberg has fended him off.
Alonso: "I give up, I give up." What's prompted that comment from the Spaniard? Is he trying to bluff Button?
Hamilton defending, but Button being told to attack by McLaren. Two laps - all to play for.
Traffic for Hamilton to negotiate - that could be an interesting extra factor to contend with.
Down the field Barrichello has passed Senna for 13th place.
'Maximum power', Alonso told. His second half of the race has been superb.
Webber struggling for traction at just the wrong moment - he's just out of range every time he moves into the DRS zone, and that is scuppering his attacks.
Rosberg has managed to hold off Alguersuari - it's been difficult to make overtaking moves stick today.
Webber sets a new fastest lap of the race. The gap between Alonso and Button is now less than a second.
Buemi has just shot by Di Resta and takes 9th place.
It's very much like the championship battle, in fact - Vettel well out on his own up front, and the next four drivers going toe-to-toe with very little separating them!
Hamilton survives another lap, Button just drops off a touch - it's going to be a thrilling five laps.
Webber gets ahead at turn one! Into second - but Hamilton can open the DRS immediately down the straight - and takes the place straight back!
Alonso still storming along at the same pace. He's going to be on hand if anyone makes a mistake.
0.7seconds the gap between Hamilton and Webber, and the margin is the same between Webber and Button.
Webber too knows that any mistake could see him leapfrogged by Button, so he can't make a speculative move without risking track position.
Webber has a good look up the inside of Hamilton's McLaren there, but Hamilton does a good job defensively. It looks like it will take a defensive error from Hamilton to cede position.
Vettel given a reminder by his engineer that there's no need to push when he has an 11-second lead. In other words, stop enjoying yourself, Seb...
Top ten: Vettel, Hamilton, Webber, Button, Alonso, Massa, Rosberg, Alguersuari, Di Resta, Buemi
Vettel has got himself back on pace, while Button has also stepped up his speed with a lap in the 1:40s to bridge the gap to Webber.
Alonso is carving out half a second on Button every lap with an excellent spell. The gap now down to three seconds.
McLaren garage say that Hamilton is not running slow - he's on their expected pace. Webber looks considerably quicker.
Button asked to see if he can get on to the back of Webber's car now.
If the Red Bull duo finish in their current positions they will wrap up the constructors' championship here in Korea.
Button just watching the battle ahead of him unfold at a safe distance in fourth.
Lewis Hamilton having to drive a similarly defensive race at the moment - it will only take one slip and Webber will pounce.
'Think about driving tactically to keep Alguesuari behind', Rosberg is told. Sounds like he'll have to make his tyres last until the end.
Alonso sets another fastest lap - 1:40.567 - he's really shown some speed since getting some clearer air. He's now five seconds behind Button.
Alguersuari is having a superb day in the Toro Rosso and is catching Rosberg for 7th - Rosberg may have to pit again quite soon - he was in early after flat-spotting the time locking his wheels defending against the Ferraris.
Life getting very easy for Vettel - he's 10 seconds clear of the field now.
Webber has just backed off a touch from Hamilton's rear wing, while Button has maintained a two-second deficit to the Australian.
Hamilton asking for more front wing, but his engineer assures him that it's already at its maximum.
Top 10 (all drivers two stops): Vettel, Hamilton, Webber, Button, Alonso, Massa, Rosberg, Alguersuari, Di Resta, Buemi
Alonso has done it! He did a great job in those last couple of laps, and Massa will be disheartened by that.
The tyres are being prepared for Alonso to come in. He's put in some blistering laps - can he jump ahead of Massa?
No joy for Webber - he cannot find a way past Hamilton. But the longer these two tussle the more comfortable Vettel gets at the head of the field.
Another fastest lap from Alonso, bettered by Vettel straight after with a 1:40.974!
Alonso pushing to extend his advantage in clear air. Vettel has stopped, so for the moment the Ferrari leads thre race.
Massa, having stopped, is behind Buemi and Sutil in 9th place - that's a frustrating place for the Brazilian to be.
Button has closed the gap on these two after his pit stop - just 1.7 seconds behind.
Hamilton is still having a torrid time holding off Webber! Some ferocious side-to-side driving between the two!
Both drivers come out on prime tyres - and Hamilton holds on to his place ahead of the Australian! They rejoin in 6th and 7th.
Webber and Hamilton both come into the pits!
Hamilton's tyres appear to have gone off the boil - Webber putting him under real pressure.
Retirement - Maldonado's come into the pits to end his race.
Vettel set a 1:42.2 on the last lap - that explains why Hamilton struggled to keep pace.
Hamilton's just lost contact with Vettel here - 1.7 seconds the distance. Webber just half a second behind the McLaren.
Schumacher admits he's had a few scraps with Petrov this year. "The first one or two were perhaps on my account, but this one is on his."
Top ten: Vettel, Hamilton, Webber, Button, Massa, Alonso, Alguersuari, Sutil, Di Resta, Buemi
Webber holding on comfortably to the duo in front. Button losing time in fourth - in no man's land behind Webber and ahead of Massa.
Rosberg opts for the pits here - without the advantage of the track position to hold on to.
Webber has bridged the gap on Hamilton here - impressive for a man on prime tyres when the duo ahead are on the super-softs.
Rosberg locks up going into turn three! That lets Massa past - and Alonso follows!
Hamilton half a second down on Vettel - Webber a couple of seconds behind that battle, and Button has eased off to the same sort of margin behind Webber.
As if to indicate Rosberg's lack of pace, Jaime Alguersuari is closing up on the battle for fifth at the rate of a quarter of a second per lap - he'll be in the bunch shortly...
Rosberg really frustrating the Ferrari drivers here - he's evidently got the slower car, but he's able to hold off the attacking duo.
Kobayashi has to go into the pits to repair the front wing - that ends that battle for now.
Hamilton has started to match Vettel's pace here - he's still at arm's distance from the Red Bull however.
The battle between Kobayashi and Senna continues - Senna takes 14th from him at the first turn, Kobayashi reclaims it with DRS on the straight. But Senna wrests it back with KERS later in the lap.
Rosberg is having to do some defensive work here - he's holding fith place, but the Ferrari of Massa is hot on his heels.
The Schumacher-Petrov incident will be investigated after the race, race control announces.
Best lap from Vettel - a 1:42.5 - this is turning into a champion's drive.
Kobayashi may have lost a bit of his front wing there - he's just clipped Senna as he tries to battle through the midfield.
Decision: Drive-through penalty for Maldonado - he was on the wrong side of this bollard, apparently.
Bad news for Maldonado - he's been spotted hitting a bollard in the pit lane and a penalty could follow.
Webber holds off the McLaren and Button has to back away from the challenge.
Good start from Vettel, but behind him Button all over the back of Webber in the race for third.
Safety car coming in and we'll resume racing at the end of this lap...
Alguersuari dived into the pits, so the running order has become: Vettel, Hamilton, Webber, Button, Rosberg, Massa, Alonso, Alguersuari, Di Resta, Sutil, Maldonado, Buemi, Perez, Kobayashi, Barrichello, Senna, Kovalainen, Trulli
The prime tyres generally take a little bit more work to keep at race temperature - the drivers on super-softs may have an advantage at the restart. That could boost Button.
Vettel and Hamilton both on super-soft tyres, so the strategies are being mirrored here.
Stewards working hard to clear off the debris at turn 3 from that challenge.
'We're currently P5' Button is told. That should go up to fourth when Alguersuari pits.
Schumacher's race ended - Petrov may be luckier, he's going to change his front wing.
Well, Schumacher entirely innocent there - Petrov slams into the back of him and it was a bad misjudgment from the Russian. Alonso very lucky to get around the outside of that incident without getting caught.
SAFETY CAR! There's been a clash between Petrov and Schumacher at turn 3.
Vettel remains comfortably ahead of Hamilton after his stop.
Alguersuari is running in second place at the moment - Alonso, meaniwhile, has come out behind Massa in 11th!
Hamilton into the pits - Alonso follows him, but Vettel stays out! Long opening stint from the champion.
Looking at the replays it was a cheeky move from Button - Rosberg locked up having nipped ahead at the pitlane exit, and Button was opportunistic.
Massa and Webber both dived in to the pits - and it looks as if Button gets out ahead anyhow!
Well, this squabble on the track (Rosberg 11th, Button 12th) may be entertaining, but it's killing Button's strategy, and he's not gaining the time to get back ahead of the Ferraris.
Wow - Rosberg edges ahead in the pitlane - Button wrests it back immediately, but Rosberg catches him out on the straight!
Button hits the pits, as does Rosberg! Looking to undercut the Ferraris.
Rosberg joining that bunch as Massa struggles. But Alonso has a wobble of his own to ease the pressure.
Understeer for Massa as well - his engineers tell him to keep it clean, and they'll change it at the pit stop. Alonso crawling over the back of him.
The skies are certainly darkening - it's very cloudy and the track temperature is down to the mid-twenties.
Di Resta, down to 11th, hits the pits - he's using his last remaining set of super-soft tyres.
A new best time from Vettel - that helps him stretch his advantage to just above three seconds over Hamilton.
Top 10 - Vettel, Hamilton, Webber, Massa, Alonso, Button, Rosberg, Petrov, Schumacher, Alguersuari
Button steps out to have a look at passing Alonso but thinks better of it this time.
No sign of pit stops yet, but expect the racers to come in any time from now. Mind you, Petrov, who'd done six laps in qualifying on his super-softs, still performing well on this set in the Renault.
"We can have the cars in front, your pace is very strong," Button is told over the radio.
Fastest man on the track now is Button - after a wretched start he appears to have settled into a rhythm and he's caught up Alonso.
Front wing on the track - looks like it belongs to a Virgin.
Hamilton complains to his engineers of a vibration - McLaren tell him that they'll add front wing at the next stop to help solve understeer issues.
Webber, Massa and Alonso are bunching here - the Australian providing a nice tow for the Ferrari pair on the long straight to turn three. No passing move tried yet.
Massa is just beginning to reel in Mark Webber, as a few more spots of rain hit the cameras.
Plenty of nervous faces in the pitlane though about the possibility of rain - it remains light around turn four for now.
Vettel is just ekeing out a lead here - he's pulled out around half a second on the last two laps on Hamilton, moving him nicely out of striking distance on DRS.
One man on the charge is Jaime Alguersuari - the Spaniard has powered up the field to 11th and is closing in on Di Resta.
We're expecting relatively early stops in Korea - the super-softs that these racers are on will wear heavily and have already been used in qualifying.
Not going well for Button at all - he's slipped out of range of the Ferraris and is more concerned with the Mercedes of Rosberg behind him.
Webber in third now, 2.8 seconds adrift of the leading duo. Schumacher meanwhile continues his rise up the field - easy overtake to get ahead of Di Resta for ninth.
1.1 seconds the distance between Vettel and Hamilton - the McLaren man staying just within range.
Turn four is the problem - Vettel told that that is where the rain is falling.
Liuzzi had to go into the pits after losing his front wing. DRS is enabled, so there will be opportunities to attack at Yeongam.
Button has had the rough start - he lost a place to Massa, tried to get it back on the long straight but broke too late into the hairpin, and lost further spots to Alonso and Webber who turned inside him.
Turn four is a little bit wet - not so wet that it requires a tyre change for now though.
Leading 10 - Vettel, Hamilton, Massa, Webber, Alonso, Button, Rosberg, Petrov, Di Resta, Schumacher
An eventful opening lap, but Vettel up into a healthy lead.
And Vettel gets ahead of Hamilton! After all the hard work from Lewis he has to give up his spot!
Hamilton holds on on the back straight - but from nowhere Massa has shot up to third!
Plenty of incident at the back - a shunt involving a few drivers.
Away we go! Hamilton gets a great start!
Formation lap underway - weather dry and windy at present. A couple of teams believe there might be a splash of rain later on...
Sebastian Vettel is your world champion, but there's plenty to fight for elsewhere in the table.
The start of the race could be very interesting, however. It's the first time we've seen a standing start in Korea after last year's rolling start in the wet, and the second straight is into such a headwind that there will be chances aplenty for overtaking...
Yes, you read it right yesterday - we had a qualifying session and a Red Bull was not on pole. It was Lewis Hamilton who broke the deadlock, and he's ahead of Vettel, with Button third.
Good morning everyone, and welcome to live text coverage of the Korean Grand Prix from Yeongam.