Why is the team that won six of the first seven 2009 races now fighting for its championship lead? Tony Dodgins investigates

Straight out of Brawn's post-Hungary debrief, still suited up, Jenson Button's maths were spot on: "I've lost 15 points to [Mark] Webber over the last three races. At five points a race he'll be in front of me in four races' time, and there's seven left."

Brawn's major problem these past three races, more than any other team, has been generating the tyre temperature necessary to access the car's performance. Understanding why is the key to getting Button's championship challenge back on track. The BGP001 is often running front tyre temperature around 60°C, while 80°C-plus is needed to get the Bridgestones into their operating window.

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