Sebastian Vettel bounced back from a tricky Friday to set the fastest time in Free Practice 3 at the Marina Bay Street Circuit ahead of the Singapore Grand Prix.
His Scuderia Ferrari team-mate Kimi Räikkönen was second fastest ahead of championship rival Lewis Hamilton.
The Mercedes AMG Petronas Motorsport driver was half a second slower than the German with Valtteri Bottas in fourth.
The two Aston Martin Red Bull Racing drivers of Daniel Ricciardo and Max Verstappen were fifth and sixth but will need to find some pace for qualifying if they are to rival the top two teams.
Romain Grosjean in the Haas F1 Team was best of the rest in seventh with the two Racing Point Force India F1 Team of Esteban Ocon and Sergio Pérez just behind.
Fernando Alonso was tenth quickest and will be hoping for a strong result in his last Singapore Grand Prix while McLaren F1 Team-mate Stoffel Vandoorne struggled down in fifteenth.
Nico Hülkenberg finished eleventh fastest ahead of Kevin Magnussen in the second Haas with the other Renault Sport Formula One Team of Carlos Sainz Jr. in thirteenth as those two teams continue their fight for fourth in the constructors championship.
Pierre Gasly was fourteenth fastest ahead of Vandoorne with Charles Leclerc sixteenth as he aims to keep his nose clean after his incident yesterday.
Brendon Hartley in the other Red Bull Toro Rosso Honda was seventeenth ahead of Sergey Sirotkin.
The Russian scored his first point last time out but the Williams Martini Racing is struggling this weekend as team-mate Lance Stroll was slowest of the twenty drivers in the session and a couple of tenths of Marcus Ericsson in nineteenth.
Vettel and Ferrari lay down the final marker ahead of a huge qualifying session with the driver on pole winning four of the five past races at the Marina Bay.
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