Sebastian Vettel hit the front in Friday's second practice in Austin, outpacing his team-mate Mark Webber and the two Mercs...
Sebastian Vettel: "The circuit was quite slippery today; I was happy with the car, but you always know you can improve here and there. I think we got through the programme we were able to test some things, some were good and some not so good, but we will see. Ferrari looked quick this morning and McLaren could be a surprise here, and Lotus and Mercedes will be strong as normal. The track will improve now unless it rains, the car worked well on the tyres, so we'll see what we can do on Sunday."
Mark Webber: "Today was all about tyres again; getting info on them and working out how they work best. It's nice to drive the car on fresh tyres and it was good to be out there on the circuit on what was a clear day in the end. We were working on both long and short runs today. The car doesn't feel mega yet, there's still some work to do, but we'll work on that overnight."
Nico Rosberg: "That was a crazy start to the weekend with the fog and the helicopter, which forced us to stay in the pits for quite a while this morning. This afternoon we had a very good session. The car felt like it was on rails and I was very happy with the balance. I hope we can give the Red Bulls something to think about this weekend and I will be pushing 100 per cent for another podium. It's really difficult to get it right with the tyres here as the track surface is very smooth and the compounds are very hard. Therefore the tyres are lasting a long time and a lot of people will try to manage only one stop on Sunday. So it will be an exciting weekend here in Texas for the fans and it was good to see so many people out there already today."
Lewis Hamilton: "First of all, I want to say that it's great to be back here in America - this track and city are just such a beautiful place to be racing, and especially with the support from all the fans we saw out there today. The circuit was quite green today, which made it pretty slippery out there as we are using the two hardest tyre compounds this weekend. After we changed the chassis yesterday, the car felt better to drive, particularly on the long run when it was pretty consistent, so that's a positive for me. The option tyre is working well for a long stint, which may open up some possibilities for us with race strategy. It was a pretty straightforward day although we still have some work to do to nail the set-up because it's not quite there yet. But all of us in the team are focused on ending the season on a high and taking that foundation with us into the winter."
Heikki Kovalainen: "It's been a pretty smooth landing, joining Lotus F1 Team. We've had no major issues on track today and we just need to keep chipping away to see how good we can get the car for tomorrow and Sunday. We lost a bit of track time in the morning, but the car balance was reasonably good straight away. I was able to settle in and work immediately on the setup and tyre work. All the procedures and routines are quite similar up and down the pit lane, plus I'm familiar with all the systems from driving with a Renault engine already this year and previously, so it was a pretty straight-forward day."
Romain Grosjean: "It was an interesting start to the day waiting to see what the helicopter would do. After that the morning was about finding grip in the cold conditions. The afternoon was much warmer and we were able to complete some good work. We struggled a bit to get the brakes exactly as I want them on low fuel, but once that's sorted we should be well placed for tomorrow. Certainly the car feels good on the long runs so it's a positive start to the weekend."
Esteban Gutierrez: "It was a very productive day. Although the delay wasn't ideal, I feel comfortable with the track and enjoy driving here. This is important. We are in a good shape, but now we need to focus on maintaining it for qualifying tomorrow and the race on Sunday. I think we have very good chances for a good result here. There are two more races to go and my goal is to get the maximum out of what we have."
Nico Hulkenberg: "It was quite a good day. This morning was a bit of a funny situation with the fog delaying FP1. Once the session started everything went well and we managed to get through the programme we had planned. The car was ok and the performance is looking good too. However, I think there is still room for improvement, but I'm not happy with the balance on the medium tyres yet. It will be tight tomorrow, but I think we can improve."
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