Semifinal 1
samedi 28 septembre 2019, 17h05 GMT – 17h05 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Alison Dos Santos | Brazil | 48.35″ |
| 2 |  Yasmaní Copello | Turkey | + 0.04″ |
| 3 | Rasmus Mägi | Estonia | + 0.58″ |
| 4 | Mohamed Touati | Tunisia | + 0.79″ |
| 5 | Amere Lattin | United States | + 0.85″ |
| 6 |  Kemar Mowatt | Jamaica | + 0.97″ |
| 7 | Chieh Chen | Chinese Taipei | + 1.65″ |
| Kyron McMaster | British Virgin Islands | DQ |