World champion proves the class of the field on day one
McLarens Fernando Alonso continued to stamp his authority on proceedings in Canada on Friday afternoon, topping second practice with a fastest lap half a second clear of Ferraris Felipe Massa.
The Spaniard whirled his MP4-22 round in 1m 16.550s, a full seven-tenths of a second faster than team mate Lewis Hamilton, and it was only right at the end that Massa jumped up the order with his best lap of 1m 17.090s.
Hamilton did a 1m 17.307s quite early on but failed to improve on it, while Kimi Raikkonens efforts to better his 1m 17.557s best saw his Ferrari go off briefly in Turn One.
Once again, the leading quartet were head and shoulders above the rest, who were led by Nick Heidfeld. The German lapped his BMW Sauber in 1m 17.827s, but then brushed a wall, lightly damaging his F1.07s right-hand suspension. Team mate Robert Kubica was in action at last after fuel feed problems in the morning, and was 12th on 1m 18.399s.
Nico Rosberg was on form again for Williams, posting 1m 17.992s for sixth, ahead of Hondas Rubens Barrichello (1m 18.108s), Renaults Giancarlo Fisichella (1m 18.130s) and Red Bulls Mark Webber (who was initially fastest, worked down to 1m 18.181s and then had a coming together with Toro Rossos Scott Speed on the last lap).
Super Aguris Takuma Sato had a spin on his way to 10th fastest time of 1m 18.309s, which left him ahead of David Coulthard (1m 18.316s) in the second Red Bull, Kubica, Jenson Button (1m 18.474s) in the Honda, Toro Rossos Tonio Liuzzi (1m 18.493s), Anthony Davidson (1m 18.545s) for Super Aguri, Speed (1m 18.602s) and Williams Alex Wurz (1m 18.971s).
In 18th, Jarno Trulli had an adventurous afternoon, hitting a wall and damaging his Toyotas right-front suspension. He made it back to the pits for repairs, got down to 1m 18.895s, then had to crawl home all over again after the right-front suspension broke as he went over a kerb. Toyota are investigating the cause, with the focus on the front suspension upright. Team mate Ralf Schumacher was almost half a second slower, with 1m 19.331s.
Christijan Albers continued to be Spykers lead runner with 1m 19.453s, with Adrian Sutil chasing him hard on 1m 19.662s on his first visit to the track.
Right at the back, Heikki Kovalainen had got down to 1m 20.519s when he clobbered a wall out the back of the circuit in his Renault; unlike Trulli, he did not make it home.
The Finn was not alone in his indiscretion; Wurz, Hamilton and Schumacher all had off-course moments, Heidfeld and Trulli had their wall-brushers, and Kubica, Sato and Raikkonen all had spins.