400m - MEN, Heat:1 of 5 ; Official result since 21:17
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 6 | 1229 | KELVIN KIPKORIR | KEN | Sen | 46.13 | Q | ||
| 2 | 4 | 1322 | SAMUEL OGAZI | NGR | Sen | 46.56 | Q | ||
| 3 | 7 | 1271 | MOHAMED ZARHOUM | MAR | Sen | 46.76 | q | ||
| 4 | 5 | 1364 | GARDEO ISAACS | RSA | Sen | 46.85 | |||
| 6 | 3 | 1294 | IVAN DANNY GELDENHUYS | NAM | Sen | 48.22 | |||
| 7 | 8 | 1104 | KUATE E. NANA | CMR | Sen | 48.29 |