400m U20 Men, Heat:1 of 7 ; Official result since 16:43
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 3 | 673 | Junior Parasuram GABONKGOPE | JAC | JUN | 51.13 | |||
| 2 | 2 | 623 | Romeo Leburu | MRAC | JUN | 54.88 | |||
| 3 | 1 | 593 | Semakaleng KESOLOFETSE | MRAC | JUN | 56.14 | |||
| 4 | 4 | 152 | Katlo Remie Matanga | TLHJ | JUN | 58.30 | |||
| 5 | 6 | 10 | Raymond Lenna | MAHI | JUN | 1:06.56 | |||
| 5 | 452 | Mogakolodi MOTSWAKE | NJSS | JUN | DNS | ||||
| 7 | 557 | Mpho Kesiametswe | PAC | JUN | DNS | ||||
| 8 | 13 | Lere Goatsiwa | MAHI | JUN | DNS |
