400m Sen Men National, Heat:1 of 2 ; Official result since 13:22
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 202 | AMBRICO SIMONE | BEL | Sch | 50.49 | |||
| 2 | 3 | 203 | DE RAEDT BRAM | BEL | Cad | 50.90 | |||
| 3 | 4 | 214 | WILLEKENS QUINTEN | BEL | Jun | 50.91 | |||
| 4 | 6 | 206 | JACQUEMIN JULIAN | BEL | Sen | 52.23 | |||
| 5 | 2 | 212 | VEROFT REIDAR | BEL | Jun | 53.50 |