Kimi Raikkonen says both his assessment of Ferrari's performance and how it compares against its rivals is unclear due to the curtailed running caused by a sudden rain downpour in FP2.

The time typically used for longer stints and race simulations work - as it runs at the same time of day as qualifying and the race - was effectively wiped out by a massive rain shower ten minutes into the afternoon session.

With no running for almost half of FP2 Raikkonen says it tricky to understand where Ferrari's performance is compared to its front-running challengers and also feels there is much more he can extract from the SF16-H.

"We only really got so many laps done with the conditions. So for sure it's a bit unknown but it's not too bad," Raikkonen said. "Obviously it was not ideal, it was quite a messy day but that's how it is sometimes.

"I think we have a good feeling but for sure things would have been a lot more straightforward in normal conditions, it would have made it easier.

"We never really got a qualifying simulation done, because of what happened in the afternoon, so we'll see tomorrow morning and I'm sure it will be okay. It's pointless to start guessing anything. We will see tomorrow where we are."

Raikkonen's best time of the day from FP1 was a 1m 08.222s almost a full second behind the leader Nico Rosberg.