McLaren are running out of time to prove that they are capable of winning this year's Championship.
Five races into the season, defending World Champion Lewis Hamilton finds himself 32 points behind Jenson Button in the Drivers' standings.
And with Brawn GP looking like they have no intention of loosening their grip at the top, Hamilton fears that McLaren might have to write off their season if they fail to close the gap in the next couple of races.
Hamilton told The Mirror: "Brawn have a Championship-winning car.
"It is going to be tough, but the ambition is always to win.
"If we've still not scored many points by the time we get to mid-season, we may have to knock it on the head."
Source : Planet F1