After picking up just two points in the opening two races, Button will start Sunday's race from eighth.

CNN: Hamilton claims maiden Mercedes pole in Shanghai

Button led the way in the opening practice session, but the second saw the field close up behind pacesetter, Sebastian Vettel.

BBC: Jenson Button 'needs' podium finish at Italian GP

Button, who has struggled since his opening race victory in Australia was delighted by his change in fortunes.

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Both Vettel and Button will look to make up places in the opening third of the race as other drivers pit early to replace the quicker wearing "soft" tires.

CNN: Hamilton claims maiden Mercedes pole in Shanghai

Basically, every year investors get at least one reset button where they can buy into the Dow at its opening value, just later in the year.

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Its mechanical hardtop roof system is hands down the best I have seen, opening or closing completely at the touch of a single button in less than 15 seconds.

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Vettel, who sits third behind England's Button and Brazil's Barrichello in the drivers' championship, was forced to end his opening session early after smoke came from his car, but he finished sixth, 0.604secs off the pace, in the afternoon.

BBC: Rosberg sets Monaco practice pace