Canada: Alonso again on top

Fernando Alonso dominated the Friday practice time sheets in Montreal, staying half a second clear of the field in the afternoon 90-minute session.

There were several incidents; Renault's Heikki Kovalainen broke his suspension after nudging the wall, and Jarno Trulli had to stop his Toyota after incurring similar damage by bouncing across the high curbs.

It is believed that teammate Ralf Schumacher's practice time was also cut short as a safety precaution.

Adrian Sutil nearly fell victim to the famous Champion's Wall, after getting some serious air-time over the final chicane. BMW-Sauber's Robert Kubica spun in the second chicane, after missing the whole morning session with a mechanical problem.

Nico Rosberg, having deferred to the team's Japanese test driver in the morning, then got his Canadian campaign off to a rocky start when he also experienced technical trouble after just 25 laps.

Ferrari's Kimi Raikkonen had a spin en-route to fourth quickest, nearly a second off the leading pace set by Alonso's McLaren.

Felipe Massa was second best in the other red car, while Lewis Hamilton did enough only for third, eight tenths behind his championship leading teammate.

Pos Driver Team Time Behind Laps
1. Alonso McLaren-Mercedes 1:16.550 37
2. Massa Ferrari 1:17.090 + 0.540 34
3. Hamilton McLaren-Mercedes 1:17.307 + 0.757 36
4. Raikkonen Ferrari 1:17.515 + 0.965 37
5. Heidfeld BMW Sauber 1:17.827 + 1.277 42
6. Rosberg Williams-Toyota 1:17.992 + 1.442 25
7. Barrichello Honda 1:18.108 + 1.558 38
8. Fisichella Renault 1:18.130 + 1.580 40
9. Webber Red Bull-Renault 1:18.181 + 1.631 40
10. Sato Super Aguri-Honda 1:18.309 + 1.759 38
11. Coulthard Red Bull-Renault 1:18.316 + 1.766 40
12. Kubica BMW Sauber 1:18.399 + 1.849 29
13. Button Honda 1:18.474 + 1.924 36
14. Liuzzi Toro Rosso-Ferrari 1:18.493 + 1.943 33
15. Davidson Super Aguri-Honda 1:18.545 + 1.995 35
16. Speed Toro Rosso-Ferrari 1:18.602 + 2.052 37
17. Wurz Williams-Toyota 1:18.871 + 2.321 25
18. Trulli Toyota 1:18.895 + 2.345 16
19. R.Schumacher Toyota 1:19.331 + 2.781 16
20. Albers Spyker-Ferrari 1:19.453 + 2.903 38
21. Sutil Spyker-Ferrari 1:19.662 + 3.112 25
22. Kovalainen Renault 1:20.519 + 3.969 13