Button 'not quick enough'

McLaren's Jenson Button is left scratching his head after a poor qualifying session ahead of the Canadian Grand Prix, revealing he "hasn't got a clue" why he is unable to match team-mate Lewis Hamilton's pace.

Hamilton qualified second behind Sebastian Vettel, with Button lamenting his younger team-mate being faster than him "everywhere" around the Montreal track a unable to figure out why he has been struggling in qualifying during the last few Grand Prix.

Button stormed to victory in a thrilling race at the Circuit Gilles Villeneuve in 2011, coming from last place to catch and pass leader Sebastian Vettel on the final lap.

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