Kevin Magnussen says he apologised to team-mate Jolyon Palmer for their final lap collision during the Spanish Grand Prix, accepting blame for the incident.

A late pit-stop for fresher rubber by the Dane would see him make rapid in-roads on his Renault counterpart as they entered the closing stages of the Circuit de Catalunya race, preluding a last lap challenge that would see the pair come together.

Though it secured him 13th place on the road ahead of Palmer, stewards later slapped Magnussen with a ten second post-race penalty that dropped him to 15th position.

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Reflecting on the incident, Magnussen admitted it was 'unnecessary', but said the rate at which he closed on Palmer seemingly caught him unawares.

"We had contact and it was my fault," he explained. "To be honest I was four or five seconds faster per lap, so I was surprised how fast I was catching him and I thought I'd try. I had so much more pace that he hadn't seen me coming. It was a bit unnecessary as there weren't any points at stake but sometimes you get a bit excited."

Suggesting the move could have been more justified had he been in contention for a top ten finish, Magnussen says he did apologise his British team-mate afterwards.

"I apologised. If I had gained a point then fair enough, but it was just a bit of excitement."