400 m, Men
| Competition | 2019 South American Athletics U20 Championships |
|---|---|
| Venue |
Cali
 COL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Alison dos Santos |  BRA |
45.78 | ||
| 🥈 | Douglas Mendes da Silva | BRA |
46.74 | ||
| 🥉 | Marco Vilca |  PER |
47.41 |