400m U18 Men, Heat:4 of 4 ; Official result since 16:18
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 90 | Tlotlego Ketlhoilwe | MMAD | YOUTH | 51.74 | |||
| 2 | 3 | 149 | Theo Bradley Diratsagae | TLHJ | YOUTH | 54.83 | |||
| 3 | 8 | 331 | Vincent Victor ZAMBO | MTFC | YOUTH | 54.87 | |||
| 4 | 1 | 172 | Lefika SEPHIRI | RAC | YOUTH | 56.44 | |||
| 5 | 4 | 513 | Thuso Mompoloki | OAC | YOUTH | 56.61 | |||
| 6 | 2 | 121 | Thebeyame Letlole | GHAN | YOUTH | 1:02.19 | |||
| 6 | 616 | Tumiso Mogobe | MRAC | YOUTH | DNS | ||||
| 7 | 455 | Uanjanoka TJIZONGORO | NJSS | YOUTH | DNS |
