Mark Cavendish: Father 'tremendously proud'
Mark Cavendish's father tells of his pride as his son prepares to become Britain's first Olympic gold medallist in the London 2012 games.
Cavendish began cycling aged nine when he joined his local club in Douglas in the Isle of Man.
"It's unbelievable, I am proud of him in general but to see him achieving at a world-class level is tremendous," said David Cavendish.
Saturday's road race, which gets under way at 10:00 BST, is a 250km route, taking riders from the heart of London to the Surrey countryside and back.