US Sunday quotes: Williams

"Apart from affecting our pace, it made the race really physically demanding as it was already very hot out there - I gave everything I had, so it's a real shame not to earn any points. Looking to the next race at Magny Cours, I am confident because I know the track well, so I hope we have a better weekend there."

Mark Webber - DNF: "My start was reasonable and I got a slipstream behind Speed but there was someone really slow in the middle of the track and I was just minding my own business on the brakes turning in and the next minute I got harpooned by somebody on the right rear. I got launched into the air and I thought I was going to roll. Thankfully I didn't, but the damage to the car stopped me from continuing."

Sam Michael, Technical Director: "This race was disappointing for us with Mark once again falling victim to a mistake by another driver and Nico finishing just outside the points. Nico's car was mechanically sound and Bridgestone supplied a good tyre, so it is clear we need to make significant improvements. We will bounce back."

Sean O'Mahony, Principal Engineer - F1 Race Engineering, Cosworth Ltd: "It was disappointing to see Mark leave the race so early and disappointing not to have achieved a points finish with Nico, despite having attempted to extract the maximum from his engine today."