Men's 400m Hurdles Round 1 - Heat 1
vendredi 30 juillet 2021, 02h25 GMT – 07h25 GMT
| Nom | Temps | |
|---|---|---|
| 1 |  Abderrahman Samba | 48.38″ |
| 2 |  Alison dos Santos | + 0.04″ |
| 3 |  Abdelmalik Lahoulou | + 0.45″ |
| 4 |  Kemar Mowatt | + 0.68″ |
| 5 |  Ludvy Vaillant | + 0.85″ |
| 6 | Mate Koroknai | + 1.42″ |
| 7 | Chieh Chen | + 2.58″ |