By Jonathan Wong

MARK Webber has thrown in the towel. The Red Bull driver, who has 51.5 points, trails leader Jenson Button by 28.5 points with four races to go in the Formula One World Championship.

If the Australian, who is lying fourth, is to overhaul his Brawn GP rival and claim the drivers' title, he needs to win at least three of those races and hope that Button draws a blank.

However, it is a scenario that he just cannot imagine for now. 'It's over... It's mathematically possible, but virtually impossible,' he said yesterday.

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