| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2021 | 
|---|---|---|---|---|---|
| 2 | QAT | Qatar U20 | 
                             
                            QAT
                         | 
                            39.05 | |
| 3 | SWZ | Eswatini U20 | 
                             
                            SWZ
                         | 
                            39.75 | |
| 4 | POL | Poland U20 | 
                             
                            POL
                         | 
                            38.31 | |
| 5 | COL | Colombia U20 | 
                             
                            COL
                         | 
                            38.97 | |
| 6 | JAM | Jamaica U20 | 
                             
                            JAM
                         | 
                            36.84 | |
| 7 | NGR | Nigeria U20 | 
                             
                            NGR
                         | 
                            37.94 | |
| 8 | FIN | Finland U20 | 
                             
                            FIN
                         | 
                            38.92 | 
| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2021 | 
|---|---|---|---|---|---|
| 2 | ITA | Italy U20 | 
                             
                            ITA
                         | 
                            37.50 | |
| 3 | BOT | Botswana U20 | 
                             
                            BOT
                         | 
                            39.01 | |
| 4 | KSA | Saudi Arabia U20 | 
                             
                            KSA
                         | 
                            38.98 | |
| 5 | BRA | Brazil U20 | 
                             
                            BRA
                         | 
                            37.72 | |
| 6 | GRE | Greece U20 | 
                             
                            GRE
                         | 
                            38.61 | |
| 7 | RSA | South Africa U20 | 
                             
                            RSA
                         | 
                            37.65 | |
| 8 | ECU | Ecuador U20 | 
                             
                            ECU
                         |