Elsewhere on day 15 of the Games, China's world number one Zhang Yining won back-to-back table tennis golds, after defeating team-mate Wang Nan to hand the hosts a clean sweep of the medals in the women's singles.

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Forget the gentle-paced table tennis played out in a mate's garage or down the youth club, the first to 21 points quick to gloat about his or her superior talent.

BBC: Table tennis plays by the rules

Button, fastest in first practice, is 35 points behind McLaren team-mate Lewis Hamilton, who tops the table.

BBC: Jenson Button 'needs' podium finish at Italian GP

Montoya is six points behind his team-mate in the title chase and Williams are just three adrift of Ferrari in the constructors' table, but Williams are playing down the prospect of a title challenge.

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