Button: Early tyre switch crucial

Jenson Button said that McLaren's decision to switch him onto medium tyres midway through the Brazilian Grand Prix was instrumental in his podium finish. The 2009 world champion was running fourth, between Fernando Alonso's Ferrari and his team-mate Lewis Hamilton, and struggling on soft rubber when the decision was made to switch the Briton. During the second half of the race Button used two sets of the medium tyres, enabling him to overtake Alonso for the final podium spot with nine laps to go

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