Kimi Raikkonen has ended the final practice session from Bahrain on top, getting the better of both Mercedes' and Red Bulls. The Finn's best lap time was a 1:29.868. 

There's concern on the other side of the Ferrari garage as Sebastian Vettel returned to the pit-lane, reporting an issue over the radio. The German's session ended early as his team went to work on the car, investigating a suspected power unit issue.

Max Verstappen was second, but he was over half a second down on Raikkonen. Verstappen headed his teammate Daniel Ricciardo and Briton Lewis Hamilton. The reigning world champion struggled on his fast laps, with his car oversteering and running wide.  

Vettel was fifth, ahead of the second Mercedes of Valtteri Bottas. Following the Silver Arrow was the two Renault's of Nico Hulkenberg and Carlos Sainz, who will be looking to get the jump on McLaren and Haas as the weekend progresses.

Pierre Gasly and Brendon Hartley showed encouraging pace in the Toro Rosso-Honda, positioning themselves in P9 and P11. Sandwiched in between them in tenth place was Spaniard Fernando Alonso. 

Romain Grosjean was P12 for Haas, leading the Force India duo of Esteban Ocon and Sergio Perez. The remaining Haas of Kevin Magnussen followed the Pink Panthers on the timesheets.

Williams appears to be in big trouble around the Bahrain International Circuit, as it ended the practice session bottom of the timesheets, behind both Saubers. Qualifying for the race gets underway at 4 PM UK time.

Fergal Walsh