Daniel Ricciardo has ended Friday's second practice session at the Malaysian Formula One grand prix third fastest.
The Australian was behind Ferrari teammates Sebastian Vettel, who went fastest, and Kimi Raikkonen.
Vettel's time of 1min 31.261sec, a lap record around the 5.5km Sepang track, was set in the second 90-minute session in the afternoon, which was brought to an early halt after a loose drain cover caused a heavy crash for Romain Grosjean.
Vettel, who trails championship-leading title rival Lewis Hamilton by 28 points, had been fifth quickest in the rain-hit opening session.
Hamilton was only sixth fastest in the afternoon, as he had been in the first session, ahead of team mate Valtteri Bottas with both Mercedes drivers reporting a general lack of grip.
Ricciardo, who led a one-two with teammate Max Verstappen in last year's Malaysian race, was as spot ahead of the Dutchman in the session.
Fernando Alonso was an impressive fifth for McLaren.
Sergio Perez in the Force India was eighth ahead of Renault's Nico Hulkenberg and teammate Esteban Ocon who rounded out the top 10.
Frenchman Pierre Gasly, making his Formula One debut this weekend after being drafted in as a replacement for under-performing Russian Daniil Kvyat at Toro Rosso, was 15th fastest.
Neither of Friday's two sessions ran to their full 90-minute length.
The morning session was delayed by half an hour due to a tropical downpour that lashed the track minutes before its scheduled start.
Grosjean's crash in the afternoon brought out the red flags with 22 minutes of the session left.
The Frenchman hit the loose drain cover with his right rear tyre, which exploded upon impact and pitched his Haas into the barriers.
He was able to walk away from the car and confirm he had not been seriously hurt.
Race director Charlie Whiting said he and his team faced a long day to get the circuit into a safe state ahead of free practice three on Saturday afternoon.
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