Kimi Raikkonen says Ferrari still has much to improve upon ahead of qualifying for the Malaysian Grand Prix, despite setting the second fastest time in FP2 and catching the eye of Lewis Hamilton.

The Finn gave chase to Mercedes in both sessions - Nico Rosberg in FP1 and Hamilton in FP2 -, but though his three tenths margin to the front was closer than he managed in Australia, the man himself was less enamoured with the result.

"I will have to look at what the others did, but we have more to do and I think we have to still improve because we are struggling a bit. The car is still not perfect.

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"It was difficult with the tyres and the softer medium new tyre we didn't get because of the red flag [caused by Roberto Merhi's spin], but it was a bit tricky still. Obviously we have work to do and I think we should go faster. It's not a disaster."

Despite Raikkonen being unmoved by the performance, his efforts did impress Hamilton, who exclaimed the Ferrari 'looks great'.