400 m, Men
| Competition | 1990 South American Athletics U18 Championships |
|---|---|
| Venue |
Lima
 PER
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Nelson López |  ARG |
49.6 | ||
| 🥈 | Sanderlei Parrela |  BRA |
50.3 | ||
| 🥉 | Alexander Melo | BRA |
51.7 |