Red Bull's testing troubles continued in Bahrain as the team failed to emerge at all on the morning of the first day of the second test.

Having completed just 21 laps in total at the first test in Jerez, Red Bull arrived in Bahrain keen to put some mileage on the RB10. While both Lotus and Caterham were able to complete some running with the updated Renault power unit, Red Bull and Toro Rosso were confined to their respective garages during the first three hours of the day.

A delayed start to running meant both teams have only missed out on two and a half hours of track time, but the likes of Mercedes and Force India were both able to exceed Red Bull's total pre-season mileage in that time.

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The team has yet to comment on what has stopped it running, but when asked by Crash.net if the RB10 was likely to be seen soon in the afternoon, Helmut Marko said "It looks like it, yes".

Sebastian Vettel is due to drive the car if and when Red Bull does get on track on Wednesday, and he'll also be at the wheel on Thursday before handing over to Daniel Ricciardo for the final two days.