The 22 drivers have their say on the two practice sessions at a sweltering Hungaroring on the outskirts of Budapest.
Lotus
Kimi Raikkonen: "It wasn't ideal today but it wasn't that bad either. We took a bit of time to understand the new tyres and it was also very hot. It's too early to say if the heat will suit us with these new tyres, but we'll soon have a better idea. I had some traffic in the afternoon and so wasn't able to set a fast lap on new tyres, plus we have some areas to improve on with the setup. We'll try to do the best that we can in qualifying and we'll see where we are. If we get the car right we should be ok tomorrow."
Romain Grosjean: "It's been a good day overall. I didn't get to try the new tyres at Silverstone so the main focus was to work on getting the most from them which all went ok. To be honest they're not really night and day from the old ones, which is good as it means we haven't had to change too much. There's still a bit of graining and degradation to deal with but that's normal.
"Our pace looks pretty good on both compounds, but the field is quite close so it's hard to say where we are. We'll just keep doing our best to find the right compromise for qualifying and the race and see where we stand at the end of the weekend."
Mercedes
Lewis Hamilton: "We got a lot of laps in on the new tyres today which was positive and gives us a lot of information to look at and take into our programme for the weekend. We came into the weekend on the back foot a little without experiencing the new tyres.
"The balance feels different and we need to work on the right set up but we learned over the course of the day, made some changes and will make more for tomorrow. It's difficult to know how the weekend will go for us. Others look quick here but we can generally pull a bit more out in qualifying so let's see how tomorrow goes."
Nico Rosberg: "That was a busy day for us and we learned a lot in the two practice sessions. We know that it's quite challenging for our car in these hot conditions and we also had to learn about the new tyres for the first time today.
"I'm pleased with the progress that we made today but some of the other teams look quick here so we have more work to do. Tyre overheating is still an issue but I'm confident that we will be able to find a good set up and hopefully achieve a decent result this weekend."
Sauber
Nico Hulkenberg: "It has been a good Friday. I think the level of performance is a bit difficult to judge. We still need to work on low fuel pace, especially for qualifying. My run on the medium tyres also wasn't the best, so there is room for improvement there. The long run was quite consistent and in terms of pace it also looked reasonable.
"We have a good baseline and did all the tests we needed to do. The tyres were pretty straightforward. Now we have to keep working, improve small bits and see where we finish tomorrow."
Esteban Gutierrez: "Overall it was a productive Friday. We were able to draw some conclusions about the new parts we brought here, and it seems like everything is working as expected. But we still have to wait and see what happens in qualifying. We will certainly be pushing in order to improve. The weather is quite a challenge for the tyres, as we saw this afternoon, but that is something everyone has to cope with.
"It's a matter of finding the right balance between how much you can push and how long you want the tyres to last in one stint. The behaviour of the tyres is different. They are a bit more difficult to warm up, but therefore they last longer. Now we have to adapt as quickly as possible. Overall, I'm quite confident we can get a better result than in previous races."
Force India
Adrian Sutil: "It was a positive morning session and quite early on I had found a good balance with the car. In the afternoon we were working mainly on the tyres and trying to get the most from them. I felt better on the soft compared to the medium, but it was tricky to get them working all the time.
"The main thing is that we got some good information and we can hopefully improve things for tomorrow. Apart from the tyres the overall balance is good: the car behaves well under braking and on turn-in, and I'm feeling comfortable."
Paul Di Resta: "It's not been the most straightforward of days and right from the start of practice I was chasing the set-up of the car. We definitely made some progress this afternoon, but there are a lot of things to discuss tonight to try and get on top of things ahead of qualifying.
"Today was the first chance to really start doing performance work with new tyre construction and we managed to do 60 laps, which gives us lots of information going into the weekend."
Williams
Pastor Maldonado: "It wasn't a bad day for us as our performance looked better than at previous events compared to the times posted today. We still need to work on the balance as the feeling is similar, but we will analyse the data and try to close the gap for tomorrow. The heat is going to be a big factor this weekend for all teams."
Valtteri Bottas: "We did some good mechanical tests during the first practice session and we now need to look at the second session data to see how we can get more out of the car as the track improves and on the option tyre. The laptimes could have been better but I had some traffic. We still need to find a good balance with the car to try to improve for tomorrow."
Toro Rosso
Jean-Eric Vergne: "In the morning, I tried the car with the new updates the team has introduced this weekend. We had some doubts as to how it was working, so in the afternoon, we returned in some areas to our previous specification to do a check. Performance wise, we were definitely too slow today, so I expect we will need to make big changes on the car for tomorrow. I was overheating the rear tyres too much, which gave me a lot of understeer on the long runs and we were far from feeling comfortable today.
"A lot of work will be needed to make us more competitive for the rest of the weekend. The tyres are obviously very important in these conditions and we need to find out how to get the best out of them, as I was not very happy with their performance on both the long and the short runs."
Daniel Ricciardo: "We were optimistic at the start of the morning, because we had quite a few new developments on the car. However, we were unable to get the best out of them on track. We hope they will make the car quicker but it seems it is going to take a bit more study to get them producing their best results on track.
"We need to do more work on the set-up, but we have been in this situation before, so I expect that after a long debrief and more work this evening, we will be able to make progress in time for tomorrow. On the tyre front, we are seeing the usual difference between Option and Prime and in terms of the developments introduced by Pirelli, they appear to be working fine, which is positive."
Caterham
Charles Pic: "For me P1 was ok. I didn't have as much understeer as Giedo and from the start of the session had reasonable grip. In fact, we had too much grip at the rear for the first couple of runs but we improved that throughout the session.
"For P2 we made a couple more setup changes and started with a better balance than we'd had in FP1. On the long runs the degradation was ok - it's there, more at the rear than the front, but it's not huge and for me it's manageable. We can take quite a few positives from today, particularly the gap to our nearest rivals and the long run pace which is again comparable to Williams, I think we could have a good weekend ahead."
Giedo van der Garde: "Both sessions today were all about understeer. In P1 we ran a different setup to Charles' car to give us a baseline comparison and we tried some new brake material. To be honest neither the setup nor the new brake material really worked and we had to spend most of the FP1 trying to dial out the understeer. We also had a lot of front locking, something we didn't have last week in Silverstone, so we made a few changes to deal with that.
"In the afternoon the balance was a bit better but we still had the same understeer issues, and on the long runs we were seeing high degradation and graining on the front left. However, by the last long run the tyres were working better and I felt like we'd made some good progress. We'll work on all everything tonight and even though we have a lot of work ahead of us I'm pretty positive we can have a decent qualifying and race here in Hungary."
Marussia
Jules Bianchi: "It has been a busy Friday for us but we are not where we want to be yet with the car. It feels like there is quite a lot more to find if we are going to be able to fight for a better position this weekend versus our direct competitors. We are also struggling with the tyre degradation, which is quite severe, so a lot for us to look at and consider with the engineers overnight."
Max Chilton: "It's good to be back on track at the Hungaroring, a place I have great memories of, especially after the win here in GP2 last year. It's been a short day for me, having missed FP1, so I had quite a busy afternoon session to cram everything in. We worked through the usual programme but the car is not quite there yet. I'm happy with my race pace but as I missed the morning session I didn't get to work on my ultimate pace.
"I also lost a little time on the soft tyre towards the end of the session after a big piece of rubber hit the visor screen on my car and broke it, which meant that I had to come in to have it replaced. We have quite a bit of work to do to try to extract more from the car so that will be something we'll be looking at carefully this evening."
