Kevin Magnussen has been given a post-race time penalty for colliding with Renault Formula 1 team-mate Jolyon Palmer on the final lap of the Spanish Grand Prix.
Magnussen made a late change back to soft tyres while the sister car was trying to make the finish on a long stint on hards.
The Dane caught Palmer for 13th at the end and they came together at the final chicane on the last lap.
"Car #20 [Magnussen] was on a new set of soft tyres, and car #30 [Palmer] was on an older set of hard tyres leading the driver of car #20 to have significantly better grip and speed," said a statement from the stewards.
"However, the stewards determined that car #20 could not have reasonably expected to make the corner of Turn 13 without colliding with car #30, which was subsequently forced off the track."
Palmer still emerged from the incident in front and claimed 13th place.
Magnussen finished just behind him on the road but will fall to 15th behind Felipe Nasr's Sauber with the 10-second penalty applied.