Wecome back to ESPNF1's live coverage of the Canadian Grand Prix weekend. Yesterday the teams just about snuck two sessions of dry running into the day and it looks like we should have sun today and tomorrow with much higher temperatures.

The higher temperatures should make things a bit more interesting for a dry race as it will leave the teams somewhere between a one and two stop strategy. The chemical compound of this generation of Pirelli tyres actually suits the slippery surface of this circuit quite well and there are no high-speed circuits to take life out of the tyres, so we won't see the multiple pit stops we maybe expected before the weekend.

Yesterday Hamilton said a one-stop might be possible because he managed to go such a long way on a set of tyres, but Pirelli's Paul Hembery suspects the 40C track temperatures expected on Sunday will limit the super-softs to somewhere closer to 20 laps. However, that will still open up the option of a one-stop strategy for some teams.

Tom says: "It appears that my email to you yesterday, which you posted at 10:07am prior to any practice sessions, was fairly intuitive. Barring any shunts, it should be Hamilton (Mclaren, Mercedes) all the way."

However, we've also been warned not to read too much into the Friday times as different teams used their super-soft compounds at different times due to the threat of rain in the afternoon. So Hamilton's advantage on Friday might not be as clear cut as it first looked. Also, the man himself said he was concerned about Ferrari's race pace compared to his. He should be in the mix but it's going to close.

It's also worth keeping an eye out for Lotus over the rest of the weekend as its two drivers definitely didn't show their true pace on Friday. The feeling is they would have been able to get into the top ten (which was split by just 0.6s) if they'd gone out on low fuel on the super-softs in FP2.

The first images from the track show beautiful blue skies and we have 28C track temperature and 23C air temperature. It should warm up significantly before qualifying.

The time to beat heading into this session is a 1:15.259 set by Lewis Hamilton yesterday. By the time the drivers get the super-soft tyres on later in this session they should be able to smash through that barrier.

Last year's pole position time was a 1:13.014 by Sebastian Vettel so there is definitely plenty of time to be found.

The session is underway and Kovalainen is the first man on the track in the Caterham that he smashed up yesterday morning. The team did a good repair job to get him out in FP2 and now he'll be trying to make up for lost time in this session.

If you have any questions or want to make any comments in this session, please don't hesitate to get in touch by clicking on the link above this window.

All the cars have either been out or are out on an installation lap at the moment.

Rosberg has stopped on circuit. His Mercedes has come to a halt on the exit of turn seven with what appears to be a technical problem.

Rosberg told the team that he felt the clutch slipping during his practice start and then seven corners later he pulled up and got out of the car.

The track is still open despite Rosberg's stoppage but the cars are remaining in their garages for now.

That could well be the end of Rosberg's session as he's right out on the other side of the circuit and the team will struggle to get the car back before the end of the session.

Jaydeep asks: "Is Lotus really sandbagging or they have failed to match the pace of others... Or is it another cooler temperature excuse?"

They opted to run the super-soft tyres before anyone else yesterday which meant they had the worst track conditions. They were focusing on race pace anyway so they didn't really set a representative time. But it's true that the E20 seems to work better in hotter conditions so the team will be delighted by the rising track temperatures today.

Jim from Greece says: "Hi! I'm Jim from Greece! I want to ask if Button is going to have a 5-place grid penalty? I ask cos I heard that he changed his gearbox..."

It's true that McLaren did change Button's gearbox, but the regulations prohibiting gearbox changes only applies to Saturdays and Sundays. The teams are free to make as many changes as they want on Friday.

Kobayashi sets the first time of the morning with a 1:17.376.

Salman asks: "What happened to Mercs? They are the favorites this weekend but we didn't see that performance from them."

They also ran super-soft tyres in the morning session yesterday and were focusing on long run pace. They should be among the front runners in qualifying but Rosberg's early exit from this session will not help matters.

Button clocks his first time of the day with a 1:19.008. He needs to get as much running as possible today to make up for the lost time yesterday.

Raikkonen goes fastest on a 1:17.150, but Button immediately beats it with a 1:16.297 on his second flying lap.

Bob asks: "Given Vettel's performance yesterday, is he vindicated in saying the floor issue will not have an effect on the car's performance?"

The hole inevitably had some effect on car performance otherwise Red Bull would not have been running it. However, it's true that it's not a magic bullet and Webber said the team had planned to remove it for the European Grand Prix anyway.

Button comes on the radio to say he is "really struggling with front lock ups" and there is a replay that suggests just that with plumes of white smoke pouring off his front right under braking.

Vergne is off at turn two. An odd place to go off and he's put the nose in the tyres.

A replay shows that he ran wide in turn one, touched the grass, lost control of the car and then ended up colliding with the barrier at a fairly slow speed. The car doesn't look too badly damaged and Toro Rosso will hope they can get that car back to the garage before the end of the session. Vergne is walking back to the garage with his helmet on.

Richard asks: "What sectors did Lewis make his times on Thursday, given his trap speeds were so low?" Most his time was coming sector two, which is the most technical sector of the lap.

Vettel is fastest with a 1:15.440, Massa is second with a 1:15.566, Button has now improved to a 1:15.833, Perez is fourth with a 1:15.938 Kobayashi is fifth with a 1:16.104.

As I type Schumacher improves to third with a 1:15.710 - but the times are tumbling fast.

Vettel sets the fastest time of the weekend so far with a 1:15.022.

Massa has a bit of a moment in the final chicane and has to back off to avoid the wall.

Alonso pops up to second fastest with a 1:15.282. All the times have been set on the soft tyres, super-soft runs yet to come.

The two Williamses are up to sixth and seventh now and about 0.7s off the front.

Rsoberg is back in the paddock now and has headed for the hospitality. He takes a look at the timing screens on the way in but doesn't look too downhearted by his reliability problem.

Alonso goes fastest with a 1:14.737 but is beaten by Hamilton on a 1:14.712 a couple of seconds later. Things are hotting up at the front.

The top times have all been set on the soft tyres so far. We should see the super-softs towards the end of the session.

Button has been in the pits making some set-up changes. He's now back on track but can only manage the 10th fastest time on his first run. The front lock-up issue appears to be solved though.

Grosjean is out on super-soft tyres in the Lotus.

Grosjean goes third fastest on the super-softs with a 1:14.873.

Senna improves to a 1:15.237 to take him fifth fastest. Williams was disappointed with its Monaco result and are hoping for a better performance this weekend to follow up from Maldonado's victory in Spain. Senna's latest time was on the super-softs.

Schumacher has also gone out on the super-softs.

Vettel goes quickest with a 1:14.711 with a fastest final sector, where we usually expect the Renault-powered cars to be be a little bit weaker.

Vettel is going even quicker on his soft tyres. Yesterday Pirelli said they were seeing 'negative degradation' when the improvement in pace due to a lowering fuel load outweighs the drop in pace due to tyre degradation. But Vettel can't improve on his lap as a whole as he crosses the line.

Bob asks: "Is Vettel out on super-softs?"

No, still on the softs.

Schumacher ended up fourth fastest on his super-soft run. He's 0.085s off Vettel's pace.

The two Ferraris are out on super-softs and trying to warm them up by weaving down the back straight.

Alonso sets the fastest first sector yet ... and the fastest second sector ... and goes fastest of all with a 1:14.448. That's 0.263s faster than Vettel.

Massa runs wide at turn seven after locking both front tyres on corne entry.

Raikkonen is also out on the super-soft tyres but is still about 0.5s off the pace.

Hamilton and Vettel are out on the super-softs, but aren't lighting up the timing screens ... yet.

Kartik asks: "Why the Times of Supersoft and Soft tires look like almost Identical last year we saw a massive gap of Second Between them "

The gap varies for each team but is somewhere between 0.3s and 0.5s. The soft and super-soft compounds are closer this year since the soft tyre was made softer.

Vettel goes fastest again with a 1:14.442, just 0.006s faster than Alonso. Vettel got a little stuck behind Schumacher at the end of that lap, which might not have helped.

Raikkonen is under investigation for his entry to the pit lane a couple of laps ago. He appeared to get the chicane wrong and then bail out into the pits.

Vettel is going even faster now... he gets held up by a car entering the pits and ends up with a slower time.

Webber pops up to fourth with his latest lap. Top four separated by 0.282s.

The session comes to an end with Vettel on top from Alonso, Hamilton and Webber.

It's still tight at the top but the challenge from Mercedes and Lotus has not really emerged. It will be interesting to see if they are holding something back.

Thanks for joining us in this session. We'll be back in two hours for qualifying. Make sure you join us, it should be an exciting hour.