Usain Bolt was disqualified for a false start in the 100 metres final in Daegu at the 2011 World Championships.
The championships were held in Daegu, South Korea, with the 100-metre final taking place at Daegu Stadium on 28 August 2011. Bolt was the defending champion, world-record holder and overwhelming favorite, but he left the blocks before the gun and was immediately disqualified.
This was the first global 100-metre final held under the then-new no-false-start rule. Previously, athletes generally received one collective false start before an athlete committing the next one was removed. Under the newer rule, a single false start by any athlete meant disqualification, making Bolt’s exit especially dramatic.
Yohan Blake won the title in 9.92 seconds, with Walter Dix second in 10.08 and Kim Collins third in 10.09. The city is sometimes confused with Seoul, South Korea’s capital, or with host cities of Bolt’s other major championship races.