Felipe Massa says he could have qualified in the top four for the British Grand Prix if not for a problem in the dying moments of qualifying.
The Ferrari driver will start from a season-worst ninth place after being unable to complete his final run because of a problem to release a tyre from his car ahead of his last flying lap.
Massa, leading the championship for the first time in his career, believes he is in for a difficult race tomorrow, but the Brazilian has vowed to do his best to score a good result.
"It's a real shame ending up ninth on the grid because of a problem with my pitstop," said Massa. "I lost so much time as the mechanics had trouble changing the right rear wheel and I was unable to start my second run.
"I think I could have done a good time, maybe not enough to take pole but at least good enough for a place on the front two rows.
"There was a lot of wind today and the balance of the car was not as good as yesterday and we were not as quick as at last week's test.
"Tomorrow I can definitely expect to be fighting all race long to move up the order and I will do all I can to bring home a good result: but it won't be easy."