2011 World Championships in Athletics – Men's 400 metres hurdles
The Men's 400 metres hurdles event at the 2011 World Championships in Athletics was held at the Daegu Stadium on August 29, 30 and September 1.
In the [|final], Angelo Taylor in lane 1 and L. J. van Zyl in lane 8 bookended the field going out fast into the lead. As they were completing the final turn, Taylor faltered and started hitting hurdles while Javier Culson powered into the lead. Both van Zyl and Culson slowed going into the final hurdle while David Greene cleared the hurdle with full momentum, cruising past the others to take the gold medal.Medalists
Records
Qualification standards
Schedule
Results
Heats
Qualification: First 4 in each heat and the next 4 fastest advance to the [|semifinals].
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 1 | David Greene | | 48.52 | Q |
| 1 | 1 | Cornel Fredericks | | 48.52 | Q |
| 3 | 2 | L. J. van Zyl | | 48.58 | Q |
| 4 | 2 | Isa Phillips | | 48.64 | Q, SB |
| 5 | 1 | Georg Fleischhauer | | 48.72 | Q, PB |
| 6 | 2 | Félix Sánchez | | 48.74 | Q, SB |
| 7 | 5 | Jeshua Anderson | | 48.81 | Q |
| 8 | 2 | Kerron Clement | | 48.91 | Q |
| 9 | 3 | Javier Culson | | 48.95 | Q |
| 10 | 5 | Nathan Woodward | | 49.06 | Q |
| 11 | 5 | Stanislav Melnykov | | 49.24 | Q, SB |
| 12 | 3 | Angelo Taylor | | 49.38 | Q |
| 13 | 3 | Aleksandr Derevyagin | | 49.43 | Q, SB |
| 14 | 5 | Leford Green | | 49.45 | Q |
| 15 | 3 | Andrés Silva | | 49.48 | Q |
| 16 | 2 | Vincent Kiplangat Kosgei | | 49.49 | q, SB |
| 17 | 3 | Takayuki Kishimoto | | 49.51 | q |
| 18 | 1 | Emir Bekrić | | 49.67 | Q |
| 19 | 1 | Omar Cisneros | | 49.69 | q |
| 20 | 1 | Mahau Suguimati | | 49.74 | q |
| 21 | 4 | Bershawn Jackson | | 49.82 | Q |
| 22 | 2 | Jorge Paula | | 49.82 | |
| 23 | 5 | Kurt Couto | | 49.86 | |
| 24 | 4 | Jehue Gordon | | 49.90 | Q |
| 25 | 2 | Jamele Mason | | 49.98 | |
| 26 | 4 | Josef Robertson | | 50.29 | Q |
| 27 | 4 | Jack Green | | 50.39 | Q |
| 28 | 3 | Li Zhilong | | 50.44 | |
| 29 | 4 | Cheng Wen | | 50.51 | |
| 30 | 5 | Yuta Imazeki | | 50.92 | |
| 31 | 5 | Jean Antonio Vieillesse | | 51.02 | |
| 32 | 4 | Kenneth Medwood | | 51.19 | |
| 33 | 4 | Takatoshi Abe | | 51.90 | |
| 34 | 3 | Lee Seung-yun | | 52.98 | |
Semifinals
Qualification: First 2 in each heat and the next 2 fastest advance to the final.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 1 | Javier Culson | | 48.52 | Q |
| 2 | 2 | David Greene | | 48.62 | Q |
| 3 | 3 | Bershawn Jackson | | 48.80 | Q |
| 4 | 1 | Cornel Fredericks | | 48.83 | Q |
| 5 | 1 | Angelo Taylor | | 48.86 | q |
| 6 | 2 | Félix Sánchez | | 49.01 | Q |
| 7 | 3 | L. J. van Zyl | | 49.05 | Q |
| 8 | 3 | Aleksandr Derevyagin | | 49.07 | q, SB |
| 9 | 2 | Jehue Gordon | | 49.08 | |
| 10 | 2 | Isa Phillips | | 49.16 | |
| 11 | 3 | Leford Green | | 49.29 | |
| 12 | 1 | Jeshua Anderson | | 49.33 | |
| 13 | 3 | Georg Fleischhauer | | 49.36 | |
| 14 | 3 | Nathan Woodward | | 49.57 | |
| 15 | 1 | Jack Green | | 49.62 | |
| 16 | 2 | Andrés Silva | | 49.63 | |
| 17 | 3 | Vincent Kiplangat Kosgei | | 49.71 | |
| 18 | 1 | Stanislav Melnykov | | 49.74 | |
| 19 | 2 | Emir Bekrić | | 49.94 | |
| 20 | 1 | Takayuki Kishimoto | | 50.05 | |
| 21 | 3 | Omar Cisneros | | 50.10 | |
| 22 | 1 | Josef Robertson | | 50.39 | |
| 23 | 2 | Mahau Suguimati | | 50.89 | |
| 24 | 2 | Kerron Clement | | 52.11 | |
Final
