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Britain's Dwain Chambers celebrates after finishing first in his men's 100m round 1 heats at the London 2012 Olympic Games at the Olympic Stadium

Britain's Dwain Chambers celebrates after finishing first in his men's 100m round 1 heats at the London 2012 Olympic Games at the Olympic Stadium August 4, 2012. REUTERS/Dylan Martinez (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS TPX IMAGES OF THE DAY)

Contenders for Men's 100 metres title

There are 24 athletes who have qualified for the semi-finals of the Men's 100 metres at the London Olympic Games. Here's a look at the 12 who are favourites to be crowned the World's Fastest Man.'