Follow race positions

Latest news appears first.

Latest positions:
1 M Schumacher (Ferrari)
2 J Button (BAR)
3 JP Montoya (Williams)
4 F Alonso (Renault)
5 J Trulli (Renault)
6 R Barrichello (Ferrari)
7 R Schumacher (Williams)
8 K Raikkonen (McLaren)

Lap 62: Michael Schumacher completes his final lap for the 74th victory of his career after yet another dominating display.

Lap 59: Alonso is giving it a real go in a bid to take third place off Montoya but is quickly running out of laps.

Lap 57: Sato's race is over when the engine on his BAR blows up. His failure means that Raikkonen moves up into a points-scoring position after starting at the back of the grid.

Lap 56: The battle for fifth is hotting up, with Barrichello pushing Trulli hard.

Lap 55: Michael Schumacher holds a 25-second lead over Button with just seven laps remaining. Victory is the world champion's barring a major setback.

Lap 53: Montoya's times are falling, suggesting something may be wrong with his Williams.

Lap 50: Ralf Schumacher spins trying to hold off Alonso, who was squeezed on the inside at Tosa by the German and had no choice but to touch wheels. Schumacher drops down to seventh.

Lap 48: Alonso pits and rejoins ahead of Trulli and Barrichello, making up two spots in the pit stop process.

Lap 46: Schumacher makes a trouble-free final stop and rejoins in a comfortable lead over Button. Trulli also stops - and holds on to fourth place ahead of Barrichello.

Lap 44: Button makes his final pit stop from second place with no problems. Ralf Schumacher also stops.

Lap 43: Montoya pits from third as Barrichello also comes in, hoping to jump Trulli and make some ground on Ralf Schumacher's fourth place.

Lap 42: Raikkonen, in ninth place in the McLaren after starting from the back of the grid, makes his second and final pit stop as he aims for his first finish and first points of the season.

Lap 40: Schumacher, cruising now, is 19.6secs ahead of Button, who is not able to run at the same pace as the Ferrari.

Lap 37: Schumacher has eased his lead out to nearly 18 seconds over Button, who is 19 seconds ahead of Montoya's Williams. Ralf Schumacher is comfortable in fourth, while Trulli is struggling to hold off Barrichello and Alonso for fifth.

Lap 33: Schumacher pulls out a second on Button to increase his lead to 15.1secs. Trulli has Barrichello and Alonso right behind him in fifth place as Ralf Schumacher extends his lead over the Renault to nine seconds.

Lap 32: Schumacher's lead is down from 17 seconds to 14 seconds over Button.

Lap 31: Trulli pits and loses a place to Ralf Schumacher, who moves up to fourth.

Lap 30: Alonso pits.

Lap 29: Barrichello and Ralf Schumacher pit together and the Williams just holds on in front. Sato also pits.

Lap 28: Schumacher pits and retains the lead.

Lap 27: Button pits from second place.

Lap 26: Montoya pits from third place.

Lap 25: The second round of pit stops starts with Massa's Sauber and Webber's Jaguar.

Lap 22: Schumacher extends his lead to 14 seconds, with Montoya a similar distance behind Button. Trulli is 9.4secs further back, 1.7secs ahead of - and losing ground to - Ralf Schumacher, who is holding off Barrichello and Alonso.

Lap 21: Schumacher is 12.9secs ahead of Button after negotiating some backmarkers in the last couple of laps.

Lap 19: Ten laps after Button pitted from first place, Schumacher is 12 seconds in front.

Lap 17: Schumacher is 10.8secs ahead of Button and well over 22 seconds in front of Montoya's Williams.

Lap 16: Button is lapping more than a second slower than leader Michael Schumacher and is nearly 10 seconds adrift - the BAR's chances of victory look slim already.

Lap 15: Ralf Schumacher is holding up a train of cars in fifth place, with everyone down to Barrichello and Alonso breathing down his neck.

Lap 13: Schumacher extends his lead to 6.1secs as Trulli emerges as the big winner from the first round of stops - up to fourth place following his long first stint.

Lap 12: Trulli pits from second place leaving Schumacher with a five-second lead over Button, who is 10 seconds ahead of Montoya. Barrichello is pushing hard to pass Ralf Schumacher's Williams.

Lap 11: Michael Schumacher pits and rejoins without losing the lead following two record laps and a fastest pit stop.

Lap 10: Barrichello and Sato pit, and the Ferrari gets ahead of the BAR.

Lap nine: Button pits. Ralf Schumacher also pits.

Lap eight: Button is faster than Michael Schumacher for the second consecutive lap as Montoya and Webber pit for tyres and fuel.

Lap seven: Da Matta and Massa are the first drivers to pit in the Toyota and Sauber as Jordan's Giorgio Pantano retires from the race after running wide at Aque Minerali.

Lap six: Button looks relatively comfortable in the lead, even though Schumacher is now just 0.7secs behind the BAR.

Lap five: Button and Schumacher are streaking away from the rest. Montoya is 5.1secs behind them, with Sato the same distance behind the Williams holding up everyone down to 10th place.

Lap four: Schumacher is less than a second behind Button as the two extend the gap over Montoya to 4.1secs.

Lap three: Schumacher closes the gap to Button to 1.4secs, with Montoya three seconds behind the Ferrari. The first three are braking away as Sato in the second BAR holds up the rest.

Lap two: Button is 2.1secs ahead of Schumacher, with the recovering Montoya 1.7secs behind.

Lap one: Button and Schumacher both make good starts and hold position. Montoya makes a poor start but recovers to challenge Schumacher at Villeneuve.

Schumacher pushes Montoya off the road at the exit of Tosa holding on to the racing line, but the Colombian holds on to third, and defends hard from Ralf Schumacher up the hill to Piratella, pushing Ralf on to the grass.

Coulthard collides with the back of Alonso's Renault and breaks his front wing.

1300: Jenson Button leads the field away on the warm-up lap.

1220: With the race 40 minutes away, the sun is shining at Imola and there is no threat of rain.

British driver Jenson Button starts the race from the first pole position of his career, having become the first man to outpace world champion Michael Schumacher in qualifying this season.

Schumacher has won all three of this year's races so far in his Ferrari.

This year's race is the 10th anniversary of the death of the great Ayrton Senna, and earlier on Sunday, Senna's former team-mate and close friend Gerhard Berger drove the Brazilian's 1985 Lotus around the track in his honour.

Berger honours Senna

Senna's sister Viviane is at Imola to highlight the work of the Ayrton Senna Foundation, which helps disadvantaged children in his native Brazil.

Senna and F1 novice Roland Ratzenberger were killed at the San Marino Grand Prix on consecutive days in 1994.