Information on this page will not be updated. Facts were accurate as of August 13, 2012.
Head to Head
Dwain Chambers vs James Dasaolu
Usain Bolt - The Olympic 100m champion in pictures Pictures of the world's fastest man, Usain Bolt
London 2012: How have sprint world records changed? See how the men's 100m and 200m sprint world records have changed over time with BBC Sport's graphics.