He said: "It was my mistake to hit the wall. Looking afterwards we would probably have finished second, and that is a shame.
"I went as normal as always into the corner, and then suddenly I just completely lost the rear. It was my error. I wouldn't put it to anything else, but it is funny how there was no warning.
"Usually you feel something if there is a bit of wheelspin, but it just went and there was nothing I could do."