China Friday quotes: Brawn GP

"There seemed to be a lot of traffic on track today so my main concern was finding some clear air. It was a useful first day of running but we still have some work to do tomorrow to be happy with the balance for qualifying."

Rubens Barrichello - 3rd: "Another positive Friday and we achieved some good work today which will set us up well going into the weekend. Our main focus was on the tyres and evaluating the best way of looking after the softer option tyre and it was very useful to find out what the tyres are capable of.

"We tried various things but I did struggle for grip with my last set of tyres this afternoon. There are a lot of marbles on the track at the moment but it should clean up going into the weekend."

Ross Brawn: "We have had a productive day which has enabled us to complete a thorough evaluation of the prime and option tyres ahead of the weekend. Our main focus was on the softer option tyre and establishing the best way to work with this compound in qualifying and the race. Although we are not quite satisfied with the balance yet, the car worked well in the cooler temperatures that we are experiencing this weekend with the race taking place six months earlier than usual."