Brazilian GP race quotes: Williams

"Unfortunately we had to end the season without finishing the race today. We seemed to be struggling a bit with the prime tyre but once we put the option tyres on we seemed to be able to catch the cars in front. We had an incident with Hamilton where I tried to keep my line overtaking on the outside and we touched. It's disappointing to end the season like this but a points-finish may have been too much for us today anyway."

Xevi Pujolar - chief race engineer: "We planned a two-stop strategy with both cars today starting on option tyres. Valtteri pitted as planned for prime tyres but we extended Pastor's first stint as there was a chance of rain in the early stages. As the forecast changed we brought Pastor in for another set of options, but in the lower temperatures today both cars were struggling for pace so couldn't really fight. We continued on plan, whilst continuing to watch the weather, bringing in Pastor to switch onto the prime tyres with Valtteri back on the options for the final stage of the race. Unfortunately, Valtteri's race ended early as he retired at Turn 4 after losing his left-rear wheel when Hamilton made contact with him. Pastor then had a spin whilst racing Vergne and eventually finished in 16th."

Laurent Debout - Renault Sport F1 team support leader: "Unfortunately we could not end the V8 era and our partnership with Williams in the way we would have liked but we can still hold our heads high. After a difficult start to the year everyone at Williams and Renault worked hard to come back and we showed a lot of form in the second part of the year. We've enjoyed our two years together immensely and wish the entire team all the best for 2014. We look forward to a clean fight on track!"