400 meter Men Semi Final, Heat:1 of 3 ; Official result since 15:57
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 3 | 57 | SCOTCH Leungo | 45.59 | BOT | Senior | 46.66 | Q | |
| 2 | 5 | 521 | NENE Zakhiti | 45.51 | RSA | Senior | 46.92 | Q | |
| 3 | 4 | 581 | NYAMBE Patrick Kakozi | 45.87 | ZAM | Senior | 47.63 | ||
| 4 | 6 | 409 | ADEYEMI Sikiru | 45.93 | NGR | Senior | 48.22 | ||
| 5 | 1 | 392 | RETIEF Andre Johannes | 45.82 | NAM | Senior | 48.38 | ||
| 6 | 8 | 274 | SEEWUA William | 46.57 | KEN | Senior | 48.81 | ||
| 7 | 2 | 453 | REALE El-mir | 46.47 | REU | Senior | 50.07 | ||
| 7 | 463 | DIOUF Cheikh Tidiane | 46.13 | SEN | Senior | DNS |