Felipe Massa labelled his European Grand Prix as "terrible" after struggling with the tyres at the Baku City Circuit.
Massa started from fifth place on the grid but slipped back to the foot of the top 10, having stopped twice, compared to the one-stop approach favoured by most of his rivals.
Massa finished in 10th place, picking up a solitary championship point in the process.
"It was a really terrible race for me, one to forget," he said.
"I struggled massively with the tyres. I couldn’t make them work, I was having a lot more degradation on the rears than I thought I would.
"One point is more than it could have been because I couldn’t drive the car in the proper way and I couldn’t save the tyres either.
"We maybe need to change something in the car to make the tyres work in a different way here in the future."
Team-mate Valtteri Bottas one-stopped as he moved from eighth to sixth.
"It was a good day for us because the pace we had wasn’t enough for any more," he explained.
"It felt like a good race from my side, and we managed to do the one-stop strategy which was definitely the best one.
"I’m glad we could manage the tyres and get it to work because that made the sixth place possible."