Button's season in downward spiral

BBC Sport reflects on Jenson Button's worsening performance this season, with insights from McLaren team boss Martin Whitmarsh and sporting director Sam Michael.

Button has won just two points in his last four races, coming into Sunday's European Grand Prix, while McLaren team-mate Lewis Hamilton has nearly double Button's tally of 45.

Button got off to a great start winning the season opener in Melbourne, but has failed to perform in qualifying sessions since.

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