400mH mannen-hommes, Heat:1 of 4 ; Official result
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 9985 | Greene David** | GBR | SEN | 49.80 | Q | ||
| 2 | 4 | 1374 | Watrin Julien | DAMP | Sen | 49.99 | q | ||
| 3 | 3 | 3280 | Van Damme Robin | KAAG | Sen | 53.17 | q | ||
| 4 | 6 | 2010 | Jamli Tarich | WS | Sen | 57.35 | |||
| 5 | 7 | 2408 | Lanssens Michiel | AVT | Sen | 57.51 | |||
| 6 | 2 | 108 | Vanmarsenille Tom | FCHA | Jun | 59.52 | |||
| 7 | 8 | 3370 | Debot Cedric | LEBB | Sen | 1:01.54 |