Jarno Trulli: "We have come to Turkey at a different time of year so temperatures are unlike what we have faced in the past. But that was a good day despite the mixed track conditions - dusty in the morning then rain in the afternoon. We made it through our programme of tyre and set-up work and we didn't have any problems. The car seems okay so far but there is still work to do in order to improve the handling. Now we have to work hard over the next two days to maintain our strong start to the season with a successful race."

Timo Glock: "Both practice sessions went pretty well and the car felt good throughout the day. I also had a strong long run with competitive lap times. Graining and understeer were challenges today. On a late run I went off the track and couldn't stop the car from hitting the kerb and damaging the front wing. It was my mistake and I missed the last five minutes but it was nevertheless a good first day. I've had some successful races here in GP2 but it's difficult to overtake so qualifying is important this weekend. Our target has to be to get into the top ten tomorrow, as I did in the first two races this year."

Dieter Gass, Chief Engineer Race and Test: "Even though the weather was changeable we still made it through our programme and we collected the information that we wanted. So it was a positive day and we are in slightly better shape than we were in Barcelona. The cold weather doesn't seem to have changed too much about the circuit. In the morning the track was cleaned at the last minute and there were damp spots but it was not a problem for us. We planned to go out late anyway because we know that the circuit's dirty here at the start. That also means the tyres are difficult to evaluate because the track evolves through the sessions. So we still have to investigate that and make our decision for tomorrow. Now I hope we can build on today and come back to the performance level we showed at the beginning of the season."

To check out our Istanbul Friday gallery, click here