Ferrari drivers Kimi Raikkonen and Sebastian Vettel are confident that the outfit can make progress in order to challenge Mercedes at the Spanish Grand Prix.
Raikkonen finished second to Mercedes' Nico Rosberg during practice at the Circuit de Barcelona-Catalunya while Vettel collected fourth position.
"It was a normal Friday, we were focused on our programme," Raikkonen said.
"At one point I came back into the garage to check something in the car: we wanted to be sure that everything was ok.
"It was only a small issue and by the end of the session we managed to do all that we wanted to. It's hard to say now where we are compared to our rivals, it was not a bad day, but for sure we can still improve."
Vettel was also positive regarding the potential of the SF16-H.
"Even if today was not the perfect day, it should be better tomorrow," he explained.
"I think this afternoon was a bit more tricky for us and not as good as it was in the morning, but we can still work on the car and improve it overnight. Usually we are quite strong in this.
"In the end it is only Friday, so I think we need to be careful with our judgements. I think the first impression of our pace today was good.
"Whether we can confirm it tomorrow depends also on what the others were doing today. I believe we can make the step and be stronger tomorrow."