Jenson Button - 14th:
"We've had a tough first day of practice trying to find a good balance with the car. We tried many different set-up options over the course of the two sessions but unfortunately could not get the car to where I want it to be and struggled with a lack of grip. However we now have a great deal of information to review after trying a few evaluations and believe that we have some understanding of what is causing the problems. We need to have a good look at everything tonight and I'm hopeful that we can resolve today's issues and have a better day tomorrow."

Rubens Barrichello - 9th:
"It's been a slightly different Friday today from our recent experiences. We don't look that competitive at the moment however it is still early in the weekend and depends on the programmes and fuel levels that our competitors are running. There is a lot of work for us to achieve, particularly in the first sector where we seem to be suffering the most, but we believe that we understand the issues. We know that we can work with this car to improve its performance quickly and that puts us in a strong position to make the changes needed ahead of qualifying."

Ross Brawn - team principal:
"We've had a challenging opening day to the Turkish Grand Prix weekend as we faced issues on both sides of the garage. The team worked very hard in both sessions on a number of set-up changes and whilst we made some progress, we were not able to find a good enough balance on either car. We also experienced a lack of grip on both the prime and option tyre. I'm confident that we will get to the bottom of this overnight and should be in a much better position ready for qualifying tomorrow."