Lewis Hamilton believes that Mercedes needs to make a step forward in terms of setup after a difficult opening day of practice for the Bahrain Grand Prix.
Teammate Nico Rosberg was eighth fastest in practice today, half a second off the pace, with Hamilton 10th overall 0.822sec down. The Briton is unsure about the direction the team has taken with the setup so far this weekend.
"We're working as hard as we can and we just need to find some more time from somewhere," said Hamilton. "I don't really know where we are losing it.
"They have changed the car this weekend, changed the settings for what they think the track needs but I'm not convinced it is the right way to go. I don't know if they are right or wrong, but we were struggling for pace today. But I am sure we will find it."
Rosberg said he was struggling with understeer in his car as a result of a setup aimed at making the rear tires last longer.
"Today we had a bit too much understeer – but then again, you need to have understeer in the car, because if you load the front tires more, it helps take some load off the rear tires," he said.
"This track is really demanding on the rear tires, and that's the key to winning races here – taking care of the rear tires better. It's always a compromise."