Aragon has thrown up a terrific race - a real triumph for Stoner, and huge drama on the final lap. Great stuff, and despite Lorenzo being muscled into fourth, he still looks all but certain to take the title.
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And in they come - Lorenzo fourth, then Spies, Rossi - wait... Rossi? Dovizioso has gone off on the final lap! Crucial points squandered!
Pedrosa takes second! And by a whisker Hayden grabs third!
What does Hayden have left? He's done it getting on to the back straight!
Stoner cruising to a terrific win - his 21st in MotoGP!
But Spies grabs it back! He had the right line and he's wrested the place back! Terrific battle as we move through the last lap!
Yes - Dovizioso does it!
Great battles still in progress - will Dovizios have the slipstream in the back straight?
Dovizioso has not given up on fifth place, but he cannot find a way past the American.
Hayden's lost a little time there after that incident, he'll have to claw it back.
Three laps left - and Hayden has half a chance to get past Lorenzo - he spurns it when the Spaniard runs wide!
Stoner's lead stretches to four seconds. Pedrosa still has a couple of seconds in the pocket from Lorenzo and Hayden, who have in turn a couple of seconds from Spies and Dovizioso. Rossi all of 12 seconds astray in this battle.
Melandri, Barbera and Bautista are having a terrific scrap in the midfield here, racing for 9th place.
Hayden has closed back in on Lorenzo, and he still has four laps left to get past the points leader.
Stoner still in front, and he's extended the lead towards three seconds. Is that Pedrosa conceding defeat, his tyres wearing, or a bit of both?
Dovizioso still angling for an overtaking move on Spies - but Spies is holding on obdurately.
Pedrosa is the fastest man down the back straight - 323.5kmh - pacy.
Dovizioso and Spies are having a tremendous tussle - Spies hangs on - and Dovizioso is lucky to even stay on the bike!
Lorenzo looks to have held off the worst of Hayden's challenge and he's opened a bit of breathing room.
Randy de Puniet is out from 13th place!
If it finishes this way - Pedrosa will close the gap a touch on Lorenzo in the title race, but not enough - Stoner will leapfrog Rossi and Dovizioso to third in the standings.
Stoner hasn't won a race this year - it would be a huge effort to prevent Pedrosa winning a hat-trick of MotoGP wins - at his home track, too...
Nine laps left - the top two riders, Stoner and Hayden are swapping tenths of a second here and there, but there's no overall movement.
Hayden still pushing to get past Lorenzo - he has a little look on the outside of the Spaniard, but he won't get through this time.
Rossi has got past Simoncelli and claims seventh place
Stoner wobbles on the bike again - he's really riding that machine right to its limits.
So here we are - halfway through, and Stoner has protected his pole position manfully so far.
It loosk like Stoner has responded bravely to the Pedrosa charge and the lead has stabilised at around 1 second.
Rossi laps in a 1m51.1 - he's well off the pace at the moment.
4 seconds now separate Lorenzo and Pedrosa. Finishing third wouldn't hurt Lorenzo's title hopes.
Lorenzo's lap was a second slower than Pedrosa there, and Hayden is on his rear wheel looking for a way past.
The lead is under one second now as the home fans get behind their man. A little slide from Stoner as he prepares to defend the position.
The gap at the top is closing quickly! 1.1s now as Pedrosa charges!
Rossi is a couple of seconds behind Simoncelli here and has yet to really join the battle for 7th spot.
Pedrosa has opened up a good gap between himself and Lorenzo, and has posted the fastest lap of the race so far. 1m49.5 as he pushes.
Edwards, Aoyama and Kallio are caught in a battle for 14th place - frantic stuff.
Stoner in front and looking comfortable. Pedrosa assured in second.
Aleix Espargaro is holding 13th - can he put in a performance to replicate that of his brother in the 125cc class?
Still Stoner, Pedrosa, Lorenzo, Hayden, Spies, Dovizioso.
Stoner went under 1m50s on that last lap - he's on the pace, keeping Pedrosa at that 1.5s distance.
Hayden is closing the gap on Lorenzo a little here - can he put together a move here?
Rossi has lost a place to the rookie Barbera - but no sooner do I write the words than he grabs it straight back!
Let me give you a summary: Stoner, Pedrosa, Lorenzo, Hayden, Spies after 3 completed laps.
Pedrosa is on fire! He storms past Lorenzo on the back straight to take second! Next stop - Stoner.
Stoner wobbles as he touches the kerb - but it's a blip as he makes some progress to extend the lead to 1.5s.
Rossi not making much headway - he's stranded in eighth at the moment.
Pedrosa looking superb! Great power in the bike and the Honda glides past Hayden!
Stoner's opened up a half-second cushion to Lorenzo - it's essential breathing space after a tough start.
Hayden grabbed third in the first lap - Pedrosa has nudged past Spies and he's clambered back to fourth after that poor start!
Ben Spies has made a good start, he's up to fourth!
Lorenzo swarming all over Stoner here! The Australian hanging on as best he can!
Stoner closes out Lorenzo at the first corner - Pedrosa pushed back to fifth or sixth!
Here we go!
We're on the warm-up lap...
Valentino Rossi, continuing his comeback from a broken leg, finished 7th in qualifying.
No Loris Capirossi today, of course - he's recovering from surgery.
And we've just seen the end of the Moto2 race which
If you had a lie-in, you've missed out on a fabulous race in the 125cc class which
How's your maths on a Sunday afternoon? If Lorenzo finishes in the top 2 today, it means that we know for sure that Moto GP will have a Spanish champion - and it will most likely be Lorenzo.
The two men in the best form - Jorge Lorenzo and Dani Pedrosa - start from second and third respectively.
Yesterday it was Australian Casey Stoner who put himself on pole position.
Hello and welcome to the LIVE updates from the main event in Aragon - the MotoGP race. It's round 13, and we're at a brand new track.