Sebastian Vettel has posted the fastest time ahead of Ferrari teammate Kimi Raikkonen in final practice for the Singapore Grand Prix, while Australia’s Daniel Ricciardo finished fifth.

Vettel was 0.36 seconds quicker than Raikkonen on Saturday and 0.5 clear of Mercedes driver Lewis Hamilton on the sinewy 5km Marina Bay track.

Hamilton’s Mercedes teammate, Valtteri Bottas, was fourth fastest.

Qualifying for Sunday’s race starts at 9pm (11pm AEST).

Red Bull had a tricky session on a street circuit that’s meant to be well suited to its cars, with Ricciardo fifth and Max Verstappen sixth.

It was a welcome boost for Vettel, who was ninth in Friday’s second practice after clipping a wall and slightly damaging the right rear of his car.

This time, his car looked perfectly balanced and considerably quicker than Mercedes.

Ferrari is looking for another one-two in qualifying after Raikkonen took pole position from Vettel two weeks ago at the Italian GP.

Hamilton leads Vettel by 30 points, with six races remaining after Singapore.