Renault's Kevin Magnussen says the reason he crashed in final practice for the Canadian Grand Prix was simply because he got "caught out".

Magnussen went off in FP3 near the end of the session hitting the wall in Turn 7 with light rain and cold tyres a contributing factor. It was a heavy impact and as a result he had to sit out qualifying and will now have to race with the spare chassis on Sunday.

"It was really strange. We had put a set [of tyres] on that I had run already and they hadn't been warmed up in the blankets, they didn't have time to get them warm. We just stuck them on and they were very slippery and it is weird, because we have done it before and been alright, but maybe because the track temperature was so low it didn't work. But it caught me out," he confirmed.

"I was just going out of the corner, hit a bump and it snapped massively and then I hit the wall."

Magnussen had been using a brand new chassis, but will now revert to an older one: "It is pretty much a different car, everything was damaged. It was a very hard hit, even though it wasn't so fast I hit it so square," he added.

"We will go back to the best chassis we had before that [now]. This [one] will be repaired and I am sure when it is repaired it is going to be the best chassis still. The tub is not so damaged, but it needs repairing. It hit so much on the side, so it was only the crash structure and the crash structure takes quite a long time to fix. So when that is done, this chassis will be pretty much intact."

He also reckons he can still do well in the race, especially as rain is likely: "We are not that much worse off. I could have probably qualified 15th or 16th maybe. So it is not so much [difference] and we have a free choice if it starts to rain and we can change stuff and start from the pit lane. It is alright. There are always positives.

"Fingers crossed for rain and [then] we will see - a bit like 2011 would be nice because that race anyone could have won.

"I'm not taking anything away from Jenson who won then... but if you do something like that... Jenson is an expert on that, but what I am saying is you don't need to be fast in those circumstances. You need to take the right decisions and Jenson just took the perfect decision every time," he concluded.