400m Hurdles Men Heats, Heat:1 of 3 ; Official result since 16:52
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 7 | 538 | ZAZINI Sokwakhana | 49.28 | RSA | Senior | 50.44 | Q | |
| 2 | 1 | 75 | SAWADOGO Bienvenu Wendlasida | BUR | Senior | 50.92 | Q | ||
| 3 | 2 | 265 | MUTUNGA William | 50.37 | KEN | Senior | 51.06 | q | |
| 4 | 5 | 53 | NTWENG Victor | 49.8 | BOT | Senior | 51.52 | q | |
| 5 | 8 | 466 | GAYE Fallou | 51.96 | SEN | Senior | 53.19 | ||
| 3 | 90 | ANDRADE Jodin Jae | 49.26 | CPV | Senior | DNS | |||
| 4 | 419 | EMOGHENE Timothy | 50 | NGR | Senior | DNS | |||
| 6 | 367 | HINTI Saad | 50.45 | MAR | Senior | DNS |