400 m, Men
| Competition | 2021 South American Athletics U23 Championships |
|---|---|
| Venue |
Guayaquil
 ECU
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Douglas Mendes da Silva |  BRA |
47.22 | ||
| 🥈 | Javier Gómez |  VEN |
47.24 | ||
| 🥉 | João Falcão Cabral | BRA |
47.40 |