Jarno Trulli said he was disappointed with his result in the British Grand Prix after having hoped to fight for a podium finish.
Toyota driver Trulli started the race from fourth, but a poor getaway meant he lost vital positions before the end of the first lap. Struggling with his car's handling, the Italian managed to finish in a distant seventh place.
"It was a very hard race for me," said Trulli. "I had a difficult start because the car didn't pull away as fast as normal, so I lost a couple of positions.
"I was trying to fight back all through the race but it was not easy and the car was sliding around quite a lot; maybe this was because of the aero setup I chose yesterday.
"I expected the weather today to be a little warmer than it was and I was struggling a bit with my setup, especially on long runs. Our strategy was OK but we expected more from this race so I am determined to make up for it in Germany."
Teammate Timo Glock finished just outside of the point-scoring positions in ninth, the German also hindered by a poor start.
"It's a pity to miss out on the points, especially as I was really quick out of traffic and at the end I was able to catch Kimi (Raikkonen) quite easily," he said.
"The problem was at the first corner when I lost a few positions; that left me in traffic and compromised my race. Still, I didn't give up and I was fighting with (Giancarlo) Fisichella in the middle stint when there was a chance to get in the points.
"On the hard tires at the end the car felt good and I very quickly caught Kimi but I had no chance to overtake. I tried into the final corner on the last lap but it didn't work out. Now I am looking to the next Grand Prix, which is a home race for me and the team. I hope it will be a bit warmer there which would suit our car more than the low temperatures today."