400 m, Men
| Competition | 1990 World Athletics U20 Championships |
|---|---|
| Venue |
Plovdiv
 BUL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Chris Nelloms |  USA |
45.43 | ||
| 🥈 | Rico Lieder |  GDR |
46.28 | ||
| 🥉 | Mark Richardson |  GBR |
46.33 |
| Competition | 1990 World Athletics U20 Championships |
|---|---|
| Venue |
Plovdiv
BUL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Chris Nelloms | USA |
45.43 | ||
| 🥈 | Rico Lieder | GDR |
46.28 | ||
| 🥉 | Mark Richardson | GBR |
46.33 |