Hamilton's lap time of One minute, 34.999 seconds was the fastest ever lap of COTA, and was over two tenths of a second faster than Rosberg, who claimed his 24th consecutive front row starting spot.
Daniel Ricciardo was third, ahead of Red Bull team mate Max Verstappen but unlike the Dutchman and both Mercedes drivers, Ricciardo will start tomorrow's race on the super soft tyre as opposed to the soft tyre.
Button made his early exit after being impeded by the Renault of Palmer. Palmer protested to his team that he was not given enough information with regards to traffic, leading to him impeding the 2009 champion.
Bahrain International Circuit - Winter testing
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