Daniel Ricciardo believes he is missing out on speed in the low speed corners as he was the slowest of the Q3 runners during qualifying for the British Grand Prix.
Ricciardo, who finished on the podium at last year's race, could manage only 10th position and rued his lap being deleted, along with the pace of the RB11 at slow speed.
"It was a mixed qualifying for me," said Ricciardo. "My fastest time was deleted and it’s something we have to review as I don’t think I went off, we’ll check the video and see.
"The car felt really nice in the high-speed corners, it was a lot of fun to drive, but we have been struggling through the low-speed corners and I think that’s where we have been losing most of our time, along with the straights.
"If I start from P10, we’ll see what we can do with strategy to finish further up the grid."
Red Bull team-mate Daniil Kvyat says he could not have achieved more than seventh position.
"Our starting position is the maximum we could have achieved for today," he said.
"I drove everything out of the car, I don’t think there was anything left to extract. We came here without any big expectations and the car is handling really well this weekend.
"I have a good feeling about this track and looking forward to the race tomorrow. The race conditions can be quite challenging but we are hoping to get some good points."