Jean-Eric Vergne: "A really good day in general. I think we have done a nearly perfect Friday and I'm really happy with the performance of the car. We still have to find the best solution for a few little issues that can definitely make us quicker. We look quite strong so far and working hard tonight I'm sure we will have a good car for tomorrow and maybe fight again for Q3. It's a happy day."

Daniil Kvyat: "Even though I have raced at Sepang before in a junior formula, I have to say this was definitely one of the hottest days I have experienced, but I can't say I found it a problem to deal with. Today, we had a busy programme, looking at improving performance, doing some long runs and also trying the Medium and Hard tyres for the first time at a race weekend. I'm not completely satisfied yet with the set-up of the car. So tonight we'll look at all the data with the engineers with the aim of getting as much performance as possible out of our package for the rest of the weekend."

Phil Charles, Chief Race Engineer: "A pretty good day. We worked through the programme on both cars. Jev has done a good job right from the start, also thanks to his experience here. Daniil had a lot to learn with the tricky track and he is taking that really well. We have done some testing on his car so for tomorrow we can put together all the bits and I'm sure we can make him faster. We are quite positive and look forward to tomorrow. I think there's a little bit more to come."

Ricardo Penteado, Renault Sport F1 track support leader: "A productive day for us. In the first session we worked to bring the charged air temperature down as that will be our major concern this weekend in the heat and humidity. We got some strong results, which allowed us to work on performance in FP2. So far the driveability seems to be good and both cars are on the pace of the top 10, so overall a positive start to the weekend."

Check out our Friday gallery, here.