* Lap 1: World championship leader Fernando Alonso capitalises on his third pole position of the year and beats away fellow front-row starter Jarno Trulli. Michael Schumacher grabs third from, Rubens Barrichello, Takuma Sato, Giancarlo Fisichella, Juan Pablo Montoya, Jenson Button, Felipe Massa, Jacques Villeneuve, Kimi Räikkönen, Ralf Schumacher, Mark Webber, Nick Heidfeld, David Coulthard, Narain Karthikeyan, Christian Klien, Christijan Albers, Tiago Monteiro and Patrick Friesacher. Alonso leads by 1.4s at the end of the lap, with the Ferraris right behind Trulli.
* Lap 2: Alonso extends his lead to 2.8s. Räikkönen passes Villeneuve. Klien pulls off at Turn 4 and retires.
* Lap 3: Alonso laps in 1m16.791s and continues to pull away at about 1.4s per lap. Schumacher is on Trulli’s tail, with the rest of the top 10 spread out fairly equidistantly behind.
* Lap 4: Alonso ups his pace to 1m16.551s…
* Lap 5: …and 1m16.507s. He leads by 7.0s.
* Lap 10: Alonso stretches his advantage to 14.1s. The rest remain as they were, although Webber and Heidfeld – 13th and 14th – are losing touch with Ralf Schumacher.
* Lap 12: Monteiro passes Albers for 17th.
* Lap 13: Friesacher makes the race’s first stop.
* Lap 15: Sato, Massa, Ralf Schumacher and Monteiro refuel.
* Lap 16: Karthikeyan and Albers make their first stops.
* Lap 17: Fourth-placed Barrichello pits.
* Lap 18: Trulli and Michael Schumacher pit – and the German gets away first. Heidfeld stops, too.
* Lap 19: Fisichella, Button, Villeneuve and Webber pit.
* Lap 20: With a lead of almost half a minute, leader Alonso stops. He rejoins still in first place, with the yet-to-stop McLarens of Montoya and Räikkönen next up, 11.0s and 13.8s adrift.
* Lap 21: Coulthard pits.
* Lap 22: Sato outbrakes Barrichello amid backmarkers at the hairpin.
* Lap 23: Monteiro passes Karthikeyan.
* Lap 24: Räikkönen laps in 1m16.434s – the race’s best yet.
* Lap 25: …and 1m16.423s. Montoya pits and gets out ahead of Michael Schumacher.
* Lap 26: Alonso leads Räikkönen by 9.2s.
* Lap 27: Sato passes Trulli approaching the hairpin – but runs wide in the process and drops to 10th by the time he gets back on track.
* Lap 28: Räikkönen finally pits – which highlights the worth of his qualifying lap (third fastest to Alonso and Trulli, although a 10-slot grid penalty – post-engine change – forced him to start 13th. He rejoins second, almost half a minute behind Alonso. Montoya is third, from Michael Schumacher, Trulli, Barrichello, Button, Fisichella, Sato, Villeneuve, Ralf Schumacher, Webber, Heidfeld, Coulthard, Monteiro, Karthikeyan, Albers and Friesacher. Massa – who had been 11th – pits and retires.
* Lap 30: Webber refuels.
* Lap 34: Michael Schumacher and Sato make their second stops. Friesacher pulls off with a deflated right rear.
* Lap 37: Heidfeld refuels.
* Lap 38: Albers crashes out.
* Lap 39: Barrichello pits.
* Lap 41: Alonso makes his second stop and rejoins with about 14s in hand over Räikkönen. Montoya is fading badly and lapping more than two seconds off the pace.
* Lap 42: Coulthard pits.
* Lap 43: Ralf Schumacher pits.
* Lap 44: Fisichella pits.
* Lap 45: Trulli pits.
* Lap 46: Button pits.
* Lap 47: Michael Schumacher passes the slowing Montoya. The Colombian pulls off before the lap is over. Heidfeld makes his third stop.
* Lap 48: Villeneuve pits.
* Lap 49: Heidfeld is back in for the fourth time.
* Lap 50: Michael Schumacher makes his third stop but retains third. Alonso retains a comfortable lead over Räikkönen. Only the top four cars are now on the same lap. Sato runs wide at Estoril and collects a bit of gravel.
* Lap 51: Heidfeld ploughs on with what is now a five-stop strategy.
* Lap 54: Barrichello makes his third stop.
* Lap 55: Räikkönen makes his second and final stop and rejoins 33s adrift of Alonso. Fisichella is right on Michael Schumacher’s tail. Heidfeld pits again but still refuses to quit.
* Lap 56: Sato pits. Heidfeld manages a lap without stopping.
* Lap 58: Alonso makes a swift final stop and retains a comfortable advantage. Fisichella pits from fourth – and stalls before rejoining. He slips to sixth. Coulthard refuels, too.
* Lap 61: Alonso, Räikkönen, Michael Schumacher and Button – about to be, but not quite lapped – run first to fourth. Trulli, Fisichella, Ralf Schumacher, Villeneuve, Barrichello, Coulthard, Sato, Webber, Monteiro, Heidfeld and Karthikeyan are all between one and four laps adrift.
* Lap 62: The leader laps Button.
* Lap 70: Alonso wins by 11.8s from Räikkönen, with Michael Schumacher almost a lap in arrears. Button scores BAR-Honda’s first points of the season in fourth place. Trulli, Fisichella, Ralf Schumacher and Villeneuve complete the top eight.