| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2021 |
|---|---|---|---|---|---|
| 1 | RSA | South Africa U20 |
RSA
|
43.25 | |
| 2 | NAM | Namibia U20 |
NAM
|
43.76 | |
| 3 | POL | Poland U20 |
POL
|
42.68 | |
| 4 | NGR | Nigeria U20 |
NGR
|
42.39 | |
| 5 | JAM | Jamaica U20 |
JAM
|
41.02 | |
| 6 | ITA | Italy U20 |
ITA
|
42.84 | |
| 7 | CZE | Czech Republic U20 |
CZE
|
42.98 | |
| 8 | FIN | Finland U20 |
FIN
|
43.37 |