400m U20 Men, Heat:7 of 7 ; Official result since 16:43
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 2 | 609 | Thabang Gabotlhakanelwe | MRAC | JUN | 51.80 | |||
| 2 | 1 | 672 | Ditso LAPOLOGANG | JAC | JUN | 52.37 | |||
| 3 | 6 | 649 | Kgotla SETHIBE | MORA | JUN | 52.97 | |||
| 3 | 610 | Donald Sebalamarite | MRAC | JUN | DNS | ||||
| 4 | 613 | Thabo Basima | MRAC | JUN | DNS | ||||
| 5 | 614 | Barona Tsiamako | MRAC | JUN | DNS | ||||
| 7 | 700 | Phenyo DINTWE | JTEC | JUN | DNF | ||||
| 8 | 442 | Kamai KAZERIUA | NJSS | JUN | DNS |
