# 2007 European Athletics U23 Championships – Men's 400 metres

The men's 400 metres event at the 2007 European Athletics U23 Championships was held in Debrecen, Hungary, at Gyulai István Atlétikai Stadion on 12 and 13 July.

## Medalists

| Gold | Denis Alekseyev Russia |
| Silver | Željko Vincek Croatia |
| Bronze | Kacper Kozłowski Poland |

## Results
### Final

13 July
| Rank | Name | Nationality | Time |
| | Denis Alekseyev | Russia | 45.69 |
| | Željko Vincek | Croatia | 45.69 |
| | Kacper Kozłowski | Poland | 45.86 |
| 4 | Anton Kokorin | Russia | 45.93 |
| 5 | Richard Buck | United Kingdom | 46.15 |
| 6 | Artem Sergeyenkov | Russia | 46.19 |
| 7 | Fredrik Johansson | Sweden | 46.37 |
| 8 | Vitaliy Dubonosov | Ukraine | 46.69 |

### Semifinals

12 July Qualified: first 4 in each heat to the Final

#### Semifinal 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Denis Alekseyev | Russia | 46.13 | Q |
| 2 | Kacper Kozłowski | Poland | 46.30 | Q |
| 3 | Anton Kokorin | Russia | 46.39 | Q |
| 4 | Fredrik Johansson | Sweden | 46.52 | Q |
| 5 | Dimitrios Regas | Greece | 46.64 | |
| 6 | Yoan Décimus | France | 47.32 | |
| 7 | Teo Turchi | Italy | 47.41 | |
| 8 | Matthias Bos | Germany | 47.75 | |

#### Semifinal 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Richard Buck | United Kingdom | 46.48 | Q |
| 2 | Željko Vincek | Croatia | 46.57 | Q |
| 3 | Artem Sergeyenkov | Russia | 46.59 | Q |
| 4 | Vitaliy Dubonosov | Ukraine | 46.80 | Q |
| 5 | Jonas Plass | Germany | 47.00 | |
| 6 | Teddy Venel | France | 47.14 | |
| 7 | Catalin Cîmpeanu | Romania | 47.75 | |
| 8 | Sebastjan Jagarinec | Slovenia | 47.77 | |

### Heats

12 July Qualified: first 3 in each heat and 4 best to the Semifinals

#### Heat 1

| Rank | Name | Nationality | Time | Notes |
| 1 | Richard Buck | United Kingdom | 46.16 | Q |
| 2 | Željko Vincek | Croatia | 46.68 | Q |
| 3 | Matthias Bos | Germany | 47.07 | Q |
| 4 | Vitaliy Dubonosov | Ukraine | 47.11 | q |
| 5 | Isalbet Juarez | Italy | 47.42 | |
| | Mark Ujakpor | Spain | DNF | |

#### Heat 2

| Rank | Name | Nationality | Time | Notes |
| 1 | Denis Alekseyev | Russia | 46.52 | Q |
| 2 | Dimitrios Regas | Greece | 46.69 | Q |
| 3 | Teddy Venel | France | 46.70 | Q |
| 4 | Catalin Cîmpeanu | Romania | 47.02 | q |
| 5 | Sebastjan Jagarinec | Slovenia | 47.18 | q |
| 6 | Mohamed Amin Hamdoum | Spain | 47.81 | |
| 7 | Yuriy Shapsai | Israel | 48.39 | |

#### Heat 3

| Rank | Name | Nationality | Time | Notes |
| 1 | Jonas Plass | Germany | 47.07 | Q |
| 2 | Artem Sergeyenkov | Russia | 47.35 | Q |
| 3 | Yoan Décimus | France | 47.49 | Q |
| 4 | Petr Klofáč | Czech Republic | 47.80 | |
| 5 | Aitor Martín | Spain | 47.97 | |
| | Richard Strachan | United Kingdom | DNS | |

#### Heat 4

| Rank | Name | Nationality | Time | Notes |
| 1 | Fredrik Johansson | Sweden | 46.79 | Q |
| 2 | Anton Kokorin | Russia | 46.82 | Q |
| 3 | Kacper Kozłowski | Poland | 46.83 | Q |
| 4 | Teo Turchi | Italy | 47.08 | q |
| 5 | Marek Hrubý | Czech Republic | 47.59 | |
| 6 | Numidia Kadri | France | 48.05 | |
| 7 | Stefanos Hadjinicolaou | Cyprus | 48.30 | |

## Participation

According to an unofficial count, 25 athletes from 16 countries participated in the event.
* Croatia (1)
* Cyprus (1)
* Czech Republic (2)
* France (3)
* Germany (2)
* Greece (1)
* Israel (1)
* Italy (2)
* Poland (1)
* Romania (1)
* Russia (3)
* Slovenia (1)
* Spain (3)
* Sweden (1)
* Ukraine (1)
* United Kingdom (1)