The Australian Formula One driver Mark Webber has revealed he drove the last four races of this year's Formula One championship with a broken shoulder.
In his new book, Webber said he suffered the injury in a mountain bike accident, and had to have pain-killing injections before races in Japan and Korea, but he kept the injury secret from his Red Bull team boss Christian Horner.
Webber sustained the injury a week before the Japanese Grand Prix in early October but the fine fracture could not be treated.
It was the second time in under two years that Webber had suffered an injury while training on a mountain bike.
In November 2008, he was hit by a car while taking part in his own adventure challenge in Tasmania and suffered a major fracture of his right leg and a broken shoulder.