400 m, Men
| Competition | 2018 South American Athletics U23 Championships |
|---|---|
| Venue |
Cuenca
 ECU
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Anthony Zambrano |  COL |
45.19 | ||
| 🥈 | Alison dos Santos |  BRA |
45.97 | ||
| 🥉 | Bruno Benedito da Silva | BRA |
46.23 |