400 meter U18 Men - SemiFinal, Heat:1 of 2 ; Official result since 10:41
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 1655 | 46.51 | Q | |||||
| 2 | 3 | 1357 | MUSA DRAMMEH | GAM | U20 | 47.72 | Q | ||
| 3 | 6 | 1353 | SENNEH MODOU | GAM | U20 | 48.49 | Q | ||
| 4 | 7 | 1416 | MPHAZA JOSHUA | ZAM | U18 | 48.67 | |||
| 5 | 5 | 1410 | MWEWA ISAAC | ZAM | U18 | 48.95 | |||
| 6 | 2 | 1496 | RIINY RIINY AGOTH | SSD | U18 | 49.60 | |||
| 8 | 1228 | LUKINDO MPAJI | TAN | U18 | DNS | ||||
| 1 | 1611 | TOMAH JONATHAN | LBR | U18 | DNS |