Lewis Hamilton again criticized Pirelli's tires after failing to convert pole position into victory for the second race in a row in Germany.
The Mercedes driver slipped from first to third due to a bad start and finished fifth, almost 27 seconds adrift of winner Sebastian Vettel's Red Bull. Hamilton said he was mystified by Mercedes' lack of pace in the race compared to rivals Red Bull, Lotus and Ferrari.
"I have to hold myself back because I've got nothing positive to say about these tires," Hamilton said. "I don't understand why we struggled so much on them, but that's motor racing. The only positive is that we got some points.
"It's a shame, because the team is working so hard and doing such a good job. Clearly we've got a good car, but for some reason it just doesn't work on these tires."
Hamilton said it "doesn't help" that Mercedes will miss the forthcoming young driver test at Silverstone, after being banned for using its current car to conduct tire testing for Pirelli after May's Spanish Grand Prix.
"Missing the test doesn't help, but that's the way it is," he added. "We just have to keep pushing forward and hope and pray that this new batch of tires works on our car."