After several days of extreme temperatures and thunderstorms the AT&T Williams F1 team would be presented with sunny conditions for the opening Friday practice for the 2011 Canadian Grand Prix. Pirelli would be supplying the teams with the soft and super soft tyres fro the weekend. But Pirelli would supply two extra sets of development medium tyres for the teams to use of Friday. The hour and a half session would get underway with Kovalainen first out onto the track. More drivers would come out for their installation laps with the drivers returning to their pits.

Both of the Williams drivers Rubens Barrichello and Pastor Maldonado would take to the track as both Heidfeld and Rosberg would complete a second lap. Rubens and Pastor would pit after just one lap, while Rosberg would complete a third lap. The only driver yet to come out was Alguersuari as we now had both Lotus cars return to the track. Trulli would pit followed by Kovalainen leaving just Petrov alone on the track. Hamilton would return back out followed by Rubens and Rosberg. The Williams team would be testing new parts on their floor. Rubens would pit after carrying out some constant speed aero tests. More drivers would start to come out as Ricciardo set the first time, 1m:26.560, in his Torro Rosso. Perez would set a 1m:29.513 as Alonso set a 1m:22.158 to go fastest.

Ricciardo would improve with a 1m:23.986 as Perez set a 1m:26.299. Schumacher was now in second with a 1m:22.298. Alonso would find an improvement setting a 1m:19.981. Schumacher would set a 1m:20.377 while Alonso had pitted. The drivers were using the development tyres in the opening thirty minutes of the session. Ricciardo would pit after lowering his time with a 1m:21.040. Pastor was now out on the track joined by Alguersuari. Kobayashi and Hamilton were out on the track as Liuzzi lowered his time with a 1m:22.929 but remained fourth. Schumacher would find a huge piece of time setting a 1m:18.821 to go fastest. Hamilton was third, 1m:20.357, followed by Ricciardo and Alguersuari. Alguersuari would move up to second, 1m:19.877, while Pastor was down in ninth, 1m:27.125.

Hamilton was now second, 1m:18.914, as we now had Webber and Massa out on the track. Rubens was also out on the track as the track started to get quite busy. Alguersuari would lower his time with a 1m:19.120 as Hamilton went fastest with a 1m:18.395. Hulkenberg was eighth followed by Pastor. Pastor would improve with a 1m:22.140 to move up to sixth. Webber would take to the grass at Turn three moving up to fifth with a 1m:20.722. Ricciardo was now sixth followed by Di Resta and Pastor. Rubens would move up to ninth to be one place behind Pastor, 1m:21.664. Heidfeld was now seventh, 1m:21.000, as Hulkenberg moved up to sixth, 1m:20.063. Pastor would again find time moving up to fifth, 1m:19.770, but Rubens would take this spot with a 1m:19.654. But Rosberg would take sixth seeing Rubens and Pastor seventh and eighth.

Di Resta would split the Williams pair moving into seventh. Rubens would pit taking on a new front wing. Hamilton was still fastest from Schumacher, Alguersuari, Hulkenberg, Webber, Rosberg, Rubens, Pastor, Ricciardo, and Di Resta. Massa was now up to fourth, 1m:19.004, while team-mate Alonso would go fastest with a 1m:18.326. But Rosberg and Webber would both move ahead but Massa would set a 1m:17.707 to be fastest. For Hamilton his session had hit problems with his car in his garage with his mechanics working on his car. Rubens and Pastor were now down in thirteenth and fourteenth. Massa had improved with a 1m:17.431. But Rubens would improve with a 1m:18.852 to move up to ninth.

Button was now in fourth, 1m:18.266, moving up from eighth. Rubens would pit joining Pastor with forty two minutes remaining. Vettel and Petrov had yet to set times with Vettel coming out late after having an issue with his car. Vettel was on the prime tyre as the track became fairly quite. Vettel was now up to tenth, 1m:18.952. Schumacher and Webber had returned to the track joined by Pastor. Alonso had come back out but his run would come to a stop when the session was red flagged when he was to crash his car at the final chicane. He would lock up his right front seeing his car go over the kerb and across the track and into the barrier. Vettel's car would be removed and the session would be re-started.

Both Williams cars were out again with twenty five minutes remaining. Heidfeld would move up to fourth, 1m:18.172. The drivers were now running on the prime tyre with Alonso setting a 1m:17.102 to go fastest. Heidfeld would spin at Turn two but he was able to continue. Webber would pit while Hamilton would be sent back out with the issues with his car not totally resolved. He had lost the display on his steering wheel. Alonso would set a 1m:16.139 to be comfortably fastest. Rubens, running on the soft tyre, would move up to fourth, 1m:17.492. Button would take this spot with a 1m:17.473 pushing Rubens down to fifth. Pastor was now thirteenth and back in his pit. Button would improve to be third with a 1m:16.961. Rubens had pitted joined by Button.

Petrov had yet to set a time as Rosberg moved up to second with a 1m:16.239, running on the soft tyre. Rosberg was on a quicker lap going fastest with a 1m:16.002. Alonso was back out as Hulkenberg moved up to eighth, 1m:18.394. Rubens would be back out as Di Resta moved into eighth. Di Resta was now in fifth after setting a 1m:17.294. Rubens was now in sixth with Hulkenberg now seventh, 1m:17.549. Rosberg would go below 1m:16 with a 1m:15.591. Petrov was now in twelfth with a 1m:18.506. Schumacher was now up to fifth, 1m:17.131. With five minutes remaining Rosberg was fastest from Alonso, Massa, Button, Di Resta, Schumacher, Hulkenberg, Heidfeld, and Webber in tenth. Schumacher would improve to be third with a lap of 1m:16.574.

Rosberg would pit while Rubens would improve to be sixth, 1m:16.990. Perez was now eleventh while Button would lower his time with a 1m:16.676 but remained fourth. Hamilton was now fifth, 1m:16.842, as the session came to an end. Pastor had failed to come back out in the later stages of the session. Pastor would finish the session in seventeenth while team-mate Rubens was in an encouraging seventh, 1m:16.990.

Pos Driver           Team		     Time       Laps
1.  N Rosberg        Mercedes                1m15.591s  32
2.  F Alonso         Ferrari                 1m16.139s  27
3.  M Schumacher     Mercedes                1m16.549s  30
4.  F Massa          Ferrari                 1m16.658s  26 
5.  J Button         McLaren-Mercedes        1m16.676s  20 
6.  L Hamilton       McLaren-Mercedes        1m16.842s  19 
7.  R Barrichello    Williams-Cosworth       1m16.990s  28 
8.  P di Resta       Force India-Mercedes    1m17.294s  26 
9.  N Heidfeld       Renault                 1m17.445s  28
10. N Hulkenberg     Force India-Mercedes    1m17.549s  20
11. S Perez          Sauber-Ferrari          1m17.662s  27
12. M Webber         Red Bull-Renault        1m17.820s  30
13. J Alguersuari    Toro Rosso-Ferrari      1m18.458s  31
14. V Petrov         Renault                 1m18.506s  15
15. D Ricciardo      Toro Rosso-Ferrari      1m18.648s  35
16. S Vettel         Red Bull-Renault        1m18.852s  8
17. P Maldonado      Williams-Cosworth       1m18.932s  20
18. J Trulli         Lotus-Renault           1m19.274s  29
19. H Kovalainen     Lotus-Renault           1m19.422s  30
20. K Kobayashi      Sauber-Ferrari          1m19.577s  26
21. J D'Ambrosio     Virgin-Cosworth         1m19.838s  31
22. T Liuzzi         HRT-Cosworth            1m19.960s  23
23. T Glock          Virgin-Cosworth         1m20.520s  21
24. N Karthikeyan    HRT-Cosworth            1m20.839s  27