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.

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.

[1][2] Qualification: First 4 in each heat (Q) and the next 4 fastest (q) advance to the semifinals.

Qualification: First 2 in each heat (Q) and the next 2 fastest (q) advance to the final.