400 m, Men
| Competition | 1989 South American Athletics U20 Championships |
|---|---|
| Venue |
Montevideo
 URU
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Inaldo de Sena |  BRA |
47.53 | ||
| 🥈 | Luís Elói | BRA |
48.61 | ||
| 🥉 | Juan Díaz |  VEN |
48.82 |