Singapore GP: HRT Sunday quotes

Narain Karthikeyan - DNF: "It wasn't my best race. From the beginning we had problems with heating and we lost a lot of time on straights, but we were managing it well until I went on the dirty part of the track and the car didn't turn which resulted in me going into the wall. It's further proof that there's no room for error at street circuits. But I'll keep my good qualifying session with me as that fills me with confidence ahead of the next Grand Prix. It was a shame not to finish it off with a good result in the race."

Luis Perez-Sala, Team Principal: "It was a tough race because we were on the limit and we had to control the temperature of the brakes and engine from the start. The drivers did a good job. It's a shame that Narain crashed and had to retire. Pedro fought for 15th until the end but the high degradation of the tyres relegated him to 17th. However it was exciting to be right in the thick of things and we're very happy about that. Now we go to Japan where we won't suffer as much with the temperatures and we will have a better look at where we are to continue with our job and continue on this path."