Athletes compete in their men's 110 metres hurdles heats at the IAAF World Championships in Daegu
Liu Xiang of China (2nd L) clears a hurdle ahead of Ryan Brathwaite of Barbados (L), Willi Mathiszik of Germany (C), Sergey Shubenkov of Russia (2nd R) and Andreas Kundert of Switzerland in their men's 110 metres hurdles heats at the IAAF World Championships in Daegu August 28, 2011. REUTERS/Mark Blinch (SOUTH KOREA - Tags: SPORT ATHLETICS)