McLaren pair Lewis Hamilton and Jenson Button admitted they were disappointed with Friday practice for the Canadian Grand Prix after ending the day off the pace at the Circuit Gilles Villeneuve.
The day had started well with Button heading Hamilton in the opening 90 minute session but, despite improving their times, both drivers struggled for pace in FP2.
Hamilton was the quicker of the pair with the seventh quickest time but was more than half a second behind Sebastian Vettel and admitted that, at times, it had been like driving 'on an ice rink'.
“I guess I'd have to say I'm not entirely happy with how this afternoon went,” he said. “Today, in general, the track has been incredibly difficult to drive. It's very hard to switch the tyres on and get heat into them – it's so slippery, it's like driving on an ice rink. It's such a huge difference from when we were last here.
“We're not pulling away down the straights and we've got quite a bit of bottoming – but we can improve in those areas. We're going to have a big debrief this evening and work out where we want to go with the car for tomorrow. The graining on the option tyre made things difficult too – but I think everybody had a similar experience out there, except maybe the Red Bulls. I don't think you'll be seeing a long first stint on the option tyre on Sunday, that's for sure.”
Team-mate Button was also frustrated following the second session having posted a best lap just over a second off the pace, with the defending champion admitting that tyres had been a particular issue during the second session.
“We need to find out what changed from this morning to this afternoon,” he said. “I was happy with the car in P1, but less so in P2. Certainly, we struggled with the balance instability under braking and corner entry during P2.
“It was tough on the long runs – the tyres didn't last long. I ran with the option tyre at the end of the session for just a couple of laps, and it grained so much that I had to put the prime on, where I was two or three seconds quicker than the cars still running options. Still, I then started experiencing graining as well, so we have a few tyre issues – but then again I think almost everybody is struggling with tyre issues here. It could be a pretty interesting race.”