Kimi Raikkonen: It was a tricky day: in the first session, we struggled to find the right set up, and in the second practice I went off with new tires and couldn't set a lap time. Apart from that it was a normal Friday, it looks worse than it is. We did a normal set up work and sometimes it goes like this. We did not have any major issue, we just tried to make a sense out of it and get the car exactly where we wanted. Now we have some work to do on the set up and make it correct for tomorrow. The Mercedes look very strong as they have been all year, but we'll do our best.

Sebastian Vettel: To be fair, It was a tough day. This morning we had some problems with a little wing that failed and came off, so we lost some track time, which was a bit "costy" for the afternoon because we couldn't re-balance the car. We are a bit on the backfoot today and I am not entirely happy with the car balance yet; it is a little bit too nervous, but I think for tomorrow we can improve. On Friday usually you don't see the full picture, so hopefully tomorrow we will be a lot stronger. Today the Red Bulls were very quick, there is no doubt, but I still think we have a chance. It's Friday and I wouldn't worry too much. You never know what the others are doing, we knew about ourselves, but we didn't have the best day. For sure it will be very close with them and it will be difficult to match them tomorrow with the speed that they showed today, but I think the Ferrari you saw today is not the Ferrari you will see tomorrow.

Check out our Friday gallery from Austin, here.