Fernando Alonso remains confident he can seal the world title, despite his second place at the British Grand Prix.
With eight races remaining Alonso has 77 points, while the nearest title rival Kimi Raikkonen, who surged to third after starting 12th, has 51.
"I'm really, really confident for the rest of the season because this was the worst circuit for Renault," he said.
"If we can do this at Silverstone, then at Hockenheim (German Grand Prix) we can fight for victory."
Raikkonen's team-mate Juan Pablo Montoya denied Alonso victory at Silverstone with his first win for McLaren.
But the Finn remains Alonso's closest rival for the title, although he admits it is becoming more difficult to catch the Spaniard.
Raikkonen saw his chances of winning the British Grand Prix evaporate when he collected a 10-place penalty on the starting grid for an engine failure in Saturday practice, but still powered to third.
As a consolation, he set the fastest lap right at the end of the race.
"It's getting more difficult race by race, especially with all the problems we've had," said Raikkonen.
"We need to go race by race and see what happens but it's definitely not going right at the moment."
But Martin Whitmarsh, McLaren Racing's managing director, is confident the team can still challenge.
He said: "At the moment, we're looking at it that we can win the championship.
"I'm not putting my mortgage on it. Renault have done a good job and no-one is taking points from them apart from us.
"But we should have won the last eight races and we can win the next eight. We just have to make sure we're reliable."
Montoya, who is 51 points behind Alonso, also believes he can play his part in the title run-in over the remaining races.
"For me, this year is not over completely," said the Colombian.
"Given the fight between Kimi and Fernando, they can take each other off in two races and I can close the gap. Things can change so much.
"But then while things have played out well for me here, we might go to the next race and struggle.
"Obviously, I don't want to struggle. I want to make sure we get maximum points for the team, so we will see how things play out."