Jean-Eric Vergne lamented a 'painful' race as he missed out on points in the Brazilian Grand Prix.
Vergne started the race from 15th position but was unable to make much progress and crossed the line in 13th place.
"It was a little bit painful today," he said. "I spent almost the whole race in traffic behind [Sergio] Perez and I was slower than him, so even with the DRS open on the straight it was not possible to overtake him.
"This made me lose a lot of time and from then on my race was over. There was no way to score points today. It was a tough weekend but it’s already behind my back."
Team-mate Daniil Kvyat narrowly missed out on a point as he finished in 11th position.
"A tough race, but starting from the 17th position on the grid and ending up 11th was the highest result we could achieve today," he said.
"I really did my best but unfortunately the Mercedes powered cars were a lot quicker than us on the straights and we couldn't do anything more than this. We have tried hard to fight for 10th position but we just weren't fast enough."