Mercedes trackside engineering director Andrew Shovlin said: “We don't really have any strengths relative to them.
“We've had a lot of years where we've been able to rely on straight-line speed, or high-speed cornering or interconnecting corners. But you look at it here and we weren't taking any time out of them anywhere.
"There were a couple of corners where they really took chunks out of us in qualifying: the high-speed and also Turn 9/10, they were very strong there.
“And that's really the main thing. In qualifying we're just bang on their pace in our best corners and they're quicker in the others. So we need a faster car, as simple as that.”