Sergio Perez set the pace on the first morning of the final test in Bahrain as Red Bull had an encouraging start.

On the hottest day of testing so far, Perez was over 1.3s clear of the rest of the field having set a time of 1:35.290. His best was still two seconds shy of the pace set by Nico Rosberg at the first Bahrain test, but it was still 1.2s quicker than the fastest Force India time from last week.

Mercedes-powered cars again dominated the top of the timing screens, with Rosberg second quickest after posting a 1:36.624. He also enjoyed the most productive morning as Mercedes completed 64 laps as it built on its already impressive reliability.

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Kevin Magnussen was third fastest - 1.2s off Rosberg - as he completed 40 laps for McLaren, and was just 0.067s clear of Adrian Sutil in the Sauber, which Esteban Gutierrez told Crash.net is running with a number of updates on the engine side.

However, it was the car in fifth that is the focus of much attention as Daniel Ricciardo completed 32 laps and set the fastest time Red Bull has managed so far over the two Bahrain tests with a 1:37.908. The total is already more than Ricciardo has managed over a whole day of testing so far this pre-season.

Valtteri Bottas was sixth quickest with a 1:38.907, finally setting a lap time after completing 55 laps without doing so while Williams carried out pit stop practice on the final day of the second test.

All of the teams were able to get out on track early in the morning, but Kamui Kobayashi caused a red flag after 40 minutes when his Caterham stopped at Turn 4 with smoke pouring out of the rear. He was restricted to just seven laps before lunch, while an issue at Ferrari also limited Kimi Raikkonen's running to 12 laps.