400 m, Men
| Competition | 2010 World Athletics U20 Championships |
|---|---|
| Venue |
Moncton
 CAN
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Kirani James |  GRN |
45.89 | ||
| 🥈 | Marcell Deák Nagy |  HUN |
46.09 | ||
| 🥉 | Errol Nolan |  USA |
46.36 |
| Competition | 2010 World Athletics U20 Championships |
|---|---|
| Venue |
Moncton
CAN
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Kirani James | GRN |
45.89 | ||
| 🥈 | Marcell Deák Nagy | HUN |
46.09 | ||
| 🥉 | Errol Nolan | USA |
46.36 |