Brazilian GP: Sauber Friday quotes

Kamui Kobayashi - 12th/15th: "We did a lot of set up work today and also tested some aerodynamic items. We had a busy day, but performance wise we are not good yet. Because of the high track temperatures the rear tyres overheated. The lap times were slower in the afternoon than in the morning. The rear is really weak and so far I don't know how to cool the tyres. We will now work on that."

Nov 23, 2012, 6:58 PM

"It was a good day in terms of getting done everything that was on the programme. We did a fair amount of work, but the heat just doesn't suit us. I found the car very difficult to drive this afternoon and I think some big changes are required. The difference between the two tyre compounds is really marginal. Let's see how we can improve."

Giampaolo Dall'Ara, Head of Track Engineering: "With regard to today's programme, everything went well including the evaluation of Pirelli's tyres for next year. That was important for the 2013 car design. With regard to this weekend, we will have a long night ahead of us as we are struggling with the grip, but we have collected a lot of data regarding down force levels and set up. Now we just have to put it all together to understand where we can find performance and hopefully to be where we want to be tomorrow."