David Rudisha - Kenya
Sport: 800m
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David Rudisha from Kenya
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World champion and world record holder, David Rudisha has dominated the 800m for the past two years. In August 2010, he broke the world record twice inside a week and then took gold at last year's World Championships in South Korea. And the lanky Kenyan is the red-hot favourite to add the Olympic title to his collection. London 2012 will be his first Olympic experience - he missed out on Beijing through injury. His father, Daniel, won silver in Mexico City in 1968.