Ferrari's Sebastian Vettel is confident that the outfit can make further progress despite leading the way during the second practice session at the Chinese Grand Prix.
Vettel placed second at Shanghai despite running deep at Turn 14, as team-mate Kimi Raikkonen headed proceedings for Ferrari, with Mercedes' Nico Rosberg a tenth further back in third.
"We had a decent day and the feeling with the car was ok, but we can still improve, especially the balance," he said.
"Tonight we'll have a lot of work to do, in order to get on top of everything. For sure to go for pole is always our goal, but it's only Friday so I would't stress too much.
"This track is quite brutal on tyres, I was sliding a lot and there was a lot of degradation."
Raikkonen added that he struggled despite topping the session in the afternoon.
"It has been quite a difficult day overall, I was struggling to get the grip on the tyres probably due to the wind," he explained.
"I was sliding a lot and this feeling was not very nice. When I put the Supersofts they seemed to work better, I had more grip and this helped to have a pretty good lap."