Usain Bolt faces an enormous challenge when bidding to become the first 100m gold medallist to defend his Olympic title since Carl Lewis's 1984 success on home soil in Los Angeles followed by his victory in Seoul four years later.

30 July 2012 - London, UK - The official ENTRY LIST and comprehensive EVENT PREVIEW STORIES covering the Athletics events of the Games of the XXX Olympiad, London 2012 (Friday 3 to Sunday 12 August 2012), are now available on the IAAF website.