400m National Men, Heat:2 of 4 ; Official result since 19:20
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 117 | VERVOORT LORIN | HUY | Sch | 54.41 | |||
| 2 | 2 | 118 | WEEKERS KORNEEL | ADD | Cad | 54.84 | |||
| 3 | 5 | 114 | PRUVOST YOHAN | FRA | Sen | 55.05 | |||
| 4 | 6 | 116 | VANMARSENILLE TOM | FCHA | Sch | 55.17 | |||
| 5 | 7 | 112 | GILLIAUX NOA | ACCO | Cad | 55.72 | |||
| 6 | 3 | 111 | AHN COLIN | LACE | Sch | 56.12 | |||
| 7 | 8 | 106 | DOYEN MAXIME | CABW | Sen | 57.88 |