# 2021 European Athletics U23 Championships – Men's 400 metres hurdles

The men's 400 metres hurdles event at the 2021 European Athletics U23 Championships was held in Tallinn, Estonia, at Kadriorg Stadium on 8, 9 and 10 July.

## Records

Prior to the competition, the records were as follows:
| European U23 record | Karsten Warholm (NOR) | 47.64 | Berlin, Germany | 9 August 2018 |
| Championship U23 record | Karsten Warholm (NOR) | 48.37 | Bydgoszcz, Poland | 16 July 2017 |

## Results
### Round 1

Qualification rule: First 3 in each heat (Q) and the next 4 fastest (q) advance to the Semi-Finals.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 3 | Ramsey Angela | Netherlands | 50.26 | Q |
| 2 | 1 | Alex Knibbs | Great Britain | 50.27 | Q |
| 3 | 1 | Emil Agyekum | Germany | 50.39 | Q |
| 4 | 1 | Matej Baluch | Slovakia | 50.70 | Q, PB |
| 5 | 2 | Sebastian Urbaniak | Poland | 50.82 | q, =PB |
| 6 | 2 | Alessandro Sibilio | Italy | 50.88 | Q |
| 7 | 3 | Krzysztof Hołub | Poland | 51.02 | Q |
| 8 | 4 | Patrik Dӧmӧtӧr | Slovakia | 51.07 | Q, PB |
| 9 | 2 | Alastair Chalmers | Great Britain | 51.21 | Q |
| 10 | 2 | Iker Alfonso de Miguel | Spain | 51.21 | Q, SB |
| 11 | 4 | Omri Shiff | Israel | 51.25 | Q, PB |
| 12 | 1 | Johan Claeson | Sweden | 51.29 | q, PB |
| 13 | 3 | Julien Bonvin | Switzerland | 51.31 | Q |
| 14 | 4 | Tuur Bras | Belgium | 51.34 | Q |
| 15 | 4 | Jesús David Delgado | Spain | 51.35 | q |
| 16 | 2 | Sales Inglin | Switzerland | 51.36 | q |
| 17 | 3 | Leonardo Puca | Italy | 51.60 | |
| 18 | 3 | Filip Ličman | Czech Republic | 51.66 | PB |
| 19 | 4 | Michele Bertoldo | Italy | 51.85 | |
| 20 | 1 | Lukas Lessel | Estonia | 51.88 | PB |
| 21 | 4 | Yuben Gonçalves Munary | Turkey | 51.94 | PB |
| 22 | 1 | Jack Mitchell | Ireland | 52.07 | |
| 23 | 4 | Nahom Yirga | Switzerland | 52.20 | |
| 24 | 3 | Darius Marian Făgăraș | Romania | 52.28 | |
| 25 | 2 | Uladzimir Zhadzka | Belarus | 52.30 | |
| 26 | 2 | Michal Hušek | Czech Republic | 52.39 | |
| 27 | 3 | Leo Köhldorfer | Austria | 52.72 | |
| 28 | 1 | Ierotheos Dritsas | Greece | 52.85 | |
| 29 | 2 | Nikolasz Csókás | Hungary | 54.20 | |
| | 4 | Carl Bengtström | Sweden | DNS | DNS |

### Semifinals

Qualification rule: First 3 in each heat (Q) and the next 2 fastest (q) advance to the Final.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 1 | Ramsey Angela | Netherlands | 49.17 | Q, PB |
| 2 | 2 | Alessandro Sibilio | Italy | 49.79 | Q |
| 3 | 2 | Alex Knibbs | Great Britain | 50.00 | Q |
| 4 | 1 | Alastair Chalmers | Great Britain | 50.11 | Q |
| 5 | 2 | Julien Bonvin | Switzerland | 50.31 | Q |
| 6 | 1 | Emil Agyekum | Germany | 50.42 | Q |
| 7 | 2 | Matej Baluch | Slovakia | 50.59 | q, PB |
| 8 | 2 | Jesús David Delgado | Spain | 50.69 | q |
| 9 | 2 | Krzysztof Hołub | Poland | 50.89 | PB |
| 10 | 1 | Tuur Bras | Belgium | 51.00 | |
| 11 | 1 | Sebastian Urbaniak | Poland | 51.03 | |
| 12 | 1 | Iker Alfonso de Miguel | Spain | 51.61 | |
| 13 | 2 | Omri Shiff | Israel | 51.67 | |
| 14 | 2 | Johan Claeson | Sweden | 51.74 | |
| 15 | 1 | Patrik Dӧmӧtӧr | Slovakia | 51.75 | |
| | 1 | Sales Inglin | Switzerland | DQ | TR22.6.3 |

### Final

| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Alessandro Sibilio | Italy | 48.42 | EU23L, PB |
| | 8 | Emil Agyekum | Germany | 48.96 | PB |
| | 3 | Ramsey Angela | Netherlands | 49.07 | PB |
| 4 | 6 | Alex Knibbs | Great Britain | 49.37 | PB |
| 5 | 7 | Julien Bonvin | Switzerland | 49.56 | PB |
| 6 | 4 | Alastair Chalmers | Great Britain | 49.84 | SB |
| 7 | 2 | Matej Baluch | Slovakia | 51.17 | |
| 8 | 1 | Jesús David Delgado | Spain | 52.86 | |