China's Liu Xiang (L) leaves the tracks after getting injury in the first round competition of men's 110m hurdles at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games on August 18, 2008.

China's Liu Xiang (L) prepares prior to the first round competition of men's 110m hurdles at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games on August 18, 2008. The defending champion Liu Xiang dropped out after getting injury.

China's Liu Xiang kneels down while warming up prior to the first round competition of men's 110m hurdles at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games on August 18, 2008. The defending champion Liu Xiang dropped out after getting injury.

China's Liu Xiang looks on prior to the first round competition of men's 110m hurdles at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games on August 18, 2008. The defending champion Liu Xiang dropped out after getting injury.

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