Jenson Button led a McLaren one-two in opening practice for the Japanese Grand Prix, while soon to be world champion for a 2nd time Sebastian Vettel crashed.
Vettel was third fastest in the session and was trying to go faster when he ran wide at Degner One and hit the barriers, but the car did not sustain too much damage.
Button was quickest for much of the session and set his best time on his final lap with a 1m33.634s.
He beat his teammate Lewis Hamilton by 0.091s in front of Vettel, with Fernando Alonso fourth and Mark Webber fifth quickest.
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