ESPN rounds up all the reaction from up and down the Austin paddock following Friday practice for the 2017 U.S. Grand Prix.
Lewis Hamilton: "It's been an interesting day with lots of ups and downs in terms of how the track has moved around and how the car feels. But overall the car was feeling good. There are lots of areas we can improve on, but generally it feels like a solid platform and a solid start to the weekend. It was amazing to have so much support at the fan signing today and also arriving at the track yesterday. I seem to have a lot of support out here, which I am super grateful for. I'm excited to see everyone tomorrow."
Valtteri Bottas: "The first practice was compromised by the weather. We struggled to get many laps, and I also flat spotted at the tyres in FP1 quite badly, so we had limited running. But in second practice we got a lot of running done, both short runs and long runs. So in the end, we got everything from today that we needed. Setup-wise I think we have the usual work to do. Overall, it has been a pretty normal day. I enjoyed today, but I'm hoping there is more to come tomorrow. Hopefully it stays dry over the weekend, it would be nicer for the teams and the fans."
James Allison, technical director: "The weather forecasts for today were actually pretty unpromising from quite a long way out. We weren't expecting much useful running at all in either of the sessions. So it was something of a blessing when we managed to get a largely dry FP1. We focused all our programme around trying to get as much race preparation as we could into that single programme.
"Although that may be an unusual session, it was actually quite a good one. Both cars getting their laps done, getting a feel for the car on high and low fuel and we were reasonably pleased with the initial balance and performance that the car is showing. Obviously after losing all of FP2 the rest of the weekend is still going to be something of a scramble, but at least we go into tomorrow knowing how we ought to set the car up for both qualifying and race."
Max Verstappen: "After a challenging year it's a good feeling to sign a new contract and continue this strong relationship. I really believe in the team and they believe in me, we have a great working relationship and they gave me the chance to start a career in Formula One. We have had our ups and downs this year but I still feel really good in the team, you can see they have been working really hard to improve and today shows that we are again competitive. I enjoy being in this team which is very important for me so that's why I decided to extend my contract. If we can learn from what happened this year I have no doubt that this team can build the best car on the grid and start 2018 competing at the front. I have learnt a lot this year after what has happened, which is definitely positive. Today we showed good pace both in long run simulation and short stints so I think we have the ability to achieve a good result here."
Daniel Ricciardo: "It was not that easy today actually. The grip on the circuit was really low for what we were expecting with lap times. It's humid so the tyres were getting really hot and then you struggle to generate the desirable grip on the car. We have a few things we can obviously try for tomorrow, now that we understand a bit more from these sessions. We didn't really have the ideal set up but I think with all those things considered we're not a million miles off the pace and if we can get it right tomorrow we can still be up there. That's our target and that's realistic so we'll work on that and hopefully you'll see us among the top three tomorrow."
Sebastian Vettel: ""It was a complicated afternoon and not an easy session, but the car is quick, so we don't need to worry too much about it. The only lap I had was the one with the Ultrasofts. Before that, I made a mistake taking too much risk and pushing too early. The track was quite slippery and I lost the rear under braking. So, we lost a set of tires, and then again, towards the end of the session, I felt that something was not right with the car. So, we checked a couple of times and now we are looking at the car to see if we can find something. I need to find the rhythm tomorrow and make sure everything's in order.''
Kimi Raikkonen: ""In the morning the weather was a bit tricky to start with, but all in all it was an ok day. Just a normal Friday, in which we tried different things and learned as much as possible. Every circuit can be tricky when you're trying to go fast, and for sure there can always be an improvement; but it was only the first day of practice. We don't know what the other teams were doing and obviously it's too early to make any predictions. All we know is that tonight we have some work to do for tomorrow".
Esteban Ocon: "It was a positive day overall, testing different things on the car and working towards the ideal set-up. Finding the balance hasn't been as immediate and easy as it was in Malaysia and Suzuka, so we still have a little bit of work to do, but we are getting closer to where I want it to be. I have no doubt it will be much better tomorrow. We still need to find something in the slow-speed corners and that's where we will concentrate this evening."
Sergio Perez: "We can be quite happy about today's work. We gathered a lot of data and we're in a good place for the rest of the weekend, even if I wasn't overly convinced about the development tyres we tried this morning. It's going to be tight to be best of the rest, but I am confident we can do that: the car has been feeling good, especially in hotter conditions, so we have a good base to build on."
Felipe Massa: "It was a good Friday and it's nice to be in the top 10. I feel the car is competitive so I'm happy. I was happy with the balance, and even in the wet conditions this morning the car felt okay. I really hope tomorrow we have a car as competitive as the one we had today so we can hopefully fight at the front and score some points.''
Lance Stroll: "It was okay and the usual Friday, getting into it and figuring everything out for tomorrow. We had a couple of issues here and there with little things like the headrest coming loose on my best lap so I couldn't complete it, but all in all it was okay. Because of the problems in Japan, and again here with the headrest, I have never been able to feel the car with the new wing and the new configuration. That is a bit frustrating so we just have to start putting things together to finish the runs to show where we are. The car feels competitive so it is just about putting it all together tomorrow.''
Paddy Lowe, chief technical officer: "We had a slightly damp start but we managed to get some good runs, comparing the baseline intermediate tyre with a new intermediate test tyre that Pirelli have brought to this event. We also managed a few of our own tests in the midst of that. In the rest of FP1, we completed a dry tyre run on each car and got a good baseline. FP2 was run to a more normal plan, comparing the soft and ultrasoft on Felipe's car and the supersoft and ultrasoft on Lance's car. Felipe's pace looked reasonably good, unfortunately Lance had a loose headrest on his low fuel lap with the ultrasoft so his ultimate time on the sheet was compromised. It's a very tight midfield, as always, so we need to work hard overnight to find every little bit of margin to get ourselves good grid positions tomorrow.''
Stoffel Vandoorne: "Today was a reasonable Friday overall. This morning we faced tricky conditions to start with, but in the end it dried up and we had a really busy first practice session trying out some new aero parts. I feel that I put in a good performance, especially considering it was my first time driving on this circuit. FP2 was a bit more difficult for me. We struggled during the session with some traffic and I wasn't 100 per cent happy with the car balance, but the long-run pace looked reasonable - I was a bit happier with our long-run pace than qualifying set-up. All in all, tomorrow we have a lot of margin to improve, but we know what we have to do and hopefully we should be lot closer."
Fernando Alonso: "We lost the first session this morning because of an hydraulic issue, which was quite painful because we had several items to test, including for next year. We tried to catch up in the second session but it was difficult, so I think we'll try them again in Mexico. I believe there's still quite a bit to get out of the car - still some tenths to find, which I think probably everyone will find. We know Verstappen and Hulkenberg have penalties, so if we manage to get into Q3 tomorrow, we'll be able to start from an even better position. But if we don't make it into Q3, and we can start eighth or ninth on new tyres, it could be very good too. It's nice to drive on this track with this year's cars. It's much more fun, especially through the fast corners in the first sector. There are many more bumps than last year, so we're holding tight on the steering wheel and with the seatbelt tightly fastened. But it's fun!
Eric Boullier, McLaren-Honda racing director: "After a tricky start to the morning thanks to the mixed conditions, we've managed to make good headway with our run programme despite a compromised first session for Fernando, leading us to swap the test plan between our two cars. Both the team and drivers adapted very well and pushed hard to complete a lot of useful running in both sessions. Much of our running today was spent evaluating various components and conducting run plans to set us up for race day. This is a track that suits our car better than most, so it's important that we prepare ourselves as best we can to maximise every opportunity on Sunday. Stoffel's pace in the first session was encouraging and both drivers collected a good amount of data from their longer runs this afternoon, so we look to be in good shape going into Saturday. We still have a lot of work to do before both drivers are happy with the set-up of the car, but, providing we can maintain good reliability, we hope we can have another productive day tomorrow where we can put ourselves in the best possible position in qualifying. Although Stoffel has a five-place grid penalty, Q3 has to be our aim for both cars and we'll see what we can do from there."
Yusuke Hasegawa, Honda R&D Co. Ltd Head of F1 Project & Executive Chief Engineer: "The first day of the United States Grand Prix began with unstable, damp weather making for tricky practice conditions. Nevertheless, Stoffel was able to run though his programme as scheduled. Fernando lost some time in FP1 after the team detected a hydraulic issue, but recovered enough track time in FP2 to gather sufficient data. There is definitely more room to improve in terms of the set-up in FP3 for both cars, and I still think we are capable of reaching Q3 in tomorrow's qualifying. This weekend we have introduced a new ICE in Stoffel's car, and as a result he will incur a five-place grid penalty for the race on Sunday. Despite this we have a positive feeling about our PU after today's session and we think our package will be quite competitive here."
Daniil Kvyat: "I think it was a productive FP2. We were able to use plenty of the track time available and started the weekend on the right foot. We didn't have the full day to correct the balance and issues we had, so we will now look at all of that overnight and see where we can make some progress. We're not too far away of the guys ahead and we will aim to make a good improvement in order to be in that mix."
Brendon Hartley: "A steep learning curve today! It all went pretty smoothly and I kept the car on track without making too many mistakes, so I'm quite happy. I didn't really know what to expect from today because I just had so much to learn! I think I made quite a big progression throughout the day. The biggest difference from what I'm used to is the high-speed grip, it's incredible here in Formula 1...it was quite an eye-opener! Another challenge are the tyres, which are also quite different to what I'm used to. On the other hand, the long-run looks quite positive and I did a good job managing the tyres there - the biggest thing I need to work on now is the new tyre pace, and I'll get another crack at it tomorrow morning before qualifying. All in all, I'd say it's all coming together. We'll now work hard and go through plenty of data tonight and hopefully I'll make another step forward tomorrow."
Sean Gelael: "Another FP1 in tricky conditions... It seems like I'm bringing the rain to each track I'm driving at: it's rained at every single Free Practice session I've had up until now! It's a bit of a shame, but looking at the positive side, I'm well prepared in the wet! We were quite competitive at the start of the session. Then, when the track got quicker, my intermediate tyres were a bit warn out... After that, on the slicks, I got caught in a bit of traffic during my fast lap, so I lost a bit of time there, but overall it's been okay and we were able to do many laps, which is always good. Hopefully next week in Mexico it stays dry!"
Romain Grosjean: "We didn't get the best of everything we could. We had a problem with the ultrasoft in the afternoon, so on the timesheet we are very far away. Even so, we haven't got the sweet spot of the car. We just need to work on that. I think it's just related to how we use the tires. We know this is something where we're not always bang on. We need to find out where to put that. After that, I'm not too worried that the car's going to come back to its level. It's just getting the grip better with the compounds."
Kevin Magnussen: "It was a little bit inconclusive, but I wouldn't say it's been a bad day. It's always good to go out and have a feel for the conditions on the inters, which we did this morning, and to see where the puddles are on track. We had a few technical issues on the car that we needed to sort - just little things - but the car feels OK. The balance doesn't feel bad, and that's the main thing. We have some stuff to work on for tomorrow, so we'll see how that goes."
Guenther Steiner, team principal: "It was an inconclusive FP1 and FP2. The conditions changed so much, in FP1 mainly. In the afternoon, as well, we were a little up and down. So, I cannot really assess where we are. All in all, we're not unhappy, but we still have got work to do. There's margin to get better. We look forward to tomorrow. We'll see what we can do for FP3 and get prepared for qualifying."
Nico Hulkenberg: "It wasn't an ideal Friday on my side of the garage, but it's certainly not the end of the world. We need to get the car into its sweet spot. We know what we need to improve on the car. After a moist start to the day, the track was developing all the time. Of course, it's always great to drive the Circuit of the Americas, and I'm sure we have more in hand for tomorrow."
Carlos Sainz "It's been a busy week with everything other than driving the car so it was fantastic to get out and drive for the team for the first time today! There was a lot to learn so I'm happy we ran through everything required. We made good progress, but we've got work to do as you'd expect. Tomorrow will certainly be interesting for my first qualifying session with Renault."
Nick Chester, chassis technical director: "The rain this morning forced us to adjust our programme, but we were able to get through most of our test items and gain most of the answers we were looking for. Overall it was a reasonable day for Nico and his comments about the car were consistent with the feedback he's given us in recent events. It was Carlos's first run in the car, his insight was fresh and useful, and by the end of the day his feeling about the car was consistent with Nico's. We've had good reinforcement of where the car is and what we need to do to improve. Carlos fitted in really quickly; he was up to speed very rapidly and did a great job."
Pascal Wehrlein: "I am quite satisfied with the practice session considering that I did not drive in the morning. In FP2, my objective was to complete as many laps as possible. The car felt ok in terms of the balance. Regarding the lap times, the gap to our direct competitors was not too big either. Let's see what tomorrow brings."
Marcus Ericsson: "It is always great to drive on this circuit; I really enjoy it. In FP1 we worked through our programme focusing on mechanical and aerodynamic tests. In the afternoon, I lost some time towards the end of FP2 due to a car issue. We are now looking into our data and working on making improvements for tomorrow's qualifying."
Charles Leclerc: "I am very satisfied with my second FP1 session for the Sauber F1 Team. Following the wet session in Malaysia I had damp conditions at the beginning of FP1 again here in Austin. Towards the end of the session the track dried up. It was my first time in the car in these conditions. I like the track a lot; it is a lot of fun to drive. Overall, I am pleased that we got through our programme, which is the most important thing."
Mario Isola, head of car racing: "It was very much a day of contrasts in Austin, with damp weather in FP1 followed by warmer weather in the afternoon. And of course, one of the biggest contrasts was our pink ultrasoft tyres, compared to their usual purple colour, which certainly attracted a lot of attention! The varying conditions today meant that it was quite hard to obtain consistent data, but we saw the fastest-ever lap of Austin set in FP2 using the ultrasoft despite a tricky FP1. This morning we tried out a prototype intermediate compound, which was softer than the current compound, but with the same construction. There are still some questions to be answered about how all the compounds interact with the track this weekend."