Rivals showed serious pace - Hamilton
Lewis Hamilton said McLaren needed to go back to the drawing board after being outpaced by both Ferrari and Red Bull in the German Grand Prix.
Although Hamilton finished fourth and team-mate Jenson Button fifth, there is growing concern the British team is being left behind by their rivals.
Hamilton said: "The Ferraris and Red Bulls have picked up some serious pace.
"We have to go back to the drawing board and try to figure out where we're losing time and try to pick it up."
Hamilton added: "We got a little bit closer to them [in recent races], which I think we were, but the gap is even more now in the race.
"I did everything I could at the start because I knew that that was the place where I could really make up some ground and I managed to make up a couple of places.
Button blames lack of downforce
"But it was a very tough race today - the car didn't feel fantastic and the Ferraris and Red Bulls were very fast.
"We need to go back and figure out where we can improve and pick it up again very quickly. Today we did everything we could do."
Hamilton and Button remain first and second in the drivers' championship and McLaren continue to lead the constructors' standings.
Button said: "My start was pretty good, I got away fantastically well off the line - but we got to Turn One, and Sebastian [Vettel], who was fighting the Ferraris, braked pretty early, and I nearly went into the back of him.
"I had to take avoiding action and go wide - I hit the brakes and as soon as you do that in Turn One, you lose a lot of time. So I lost three places but thankfully I got one of those back pretty quickly.
"After my stop, my pace relative to Lewis was very similar and I settled in never less than two seconds behind him but I couldn't go any quicker because I was losing downforce to the car in front.
"Lewis and I showed today that we got the maximum out of the car - it's just that the car isn't quite quick enough at the moment."
Team principal Martin Whitmarsh said the team should not lose sight of the fact it had scored 22 valuable points.
He stated: "Today we saw yet another impressively competent day's work from both our drivers. In truth, in the circumstances that's probably about as many as we could have hoped to score today.
"From here on in, we'll work as hard as we can to maintain and improve our positions at the head of both world championships. We'll continue to develop our car in the weeks and months ahead, with a view to adding as many world championship points to the milestone total of 300 we've amassed this season as of today."