400 m M | M | 400 | M400 | Heat 1 | 2023-08-21 | 11:00:00 | 10:59:19 | | | | | | | |
| | | | | | | | | | | | | | |
1 | 6 | 1 | 127 | RUDENKO Dmytro | 90-06-12 | UKRAINE | | 50.28 | 50.08 | | | Q SB | | 1 |
2 | 5 | 1 | 65 | KOTOWSKI Grzegorz | 87-12-08 | POLAND | | 50.88 | 50.81 | | | Q SB | | 2 |
3 | 7 | 1 | 52 | BOROWSKI Mateusz | 95-01-01 | POLAND | | 50.90 | 51.30 | | | Q | | 3 |
4 | 4 | 1 | 22 | RAISP Rinat | 01-05-25 | ESTONIA | | 55.67 | 53.62 | | | q SB | | 8 |
| 3 | 1 | 116 | KOMPANIIETS Serhii | 96-05-17 | UKRAINE | | 50.67 | DNF | | | | | |