Semifinal 2
mercredi 2 octobre 2019, 19h35 GMT – 19h35 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Steven Gardiner | Bahamas | 44.13″ |
| 2 |  Kirani James | Grenada | + 0.1″ |
| 3 |  Demish Gaye | Jamaica | + 0.53″ |
| 4 |  Vernon Norwood | United States | + 0.87″ |
| 5 |  Leungo Scotch | Botswana | + 0.87″ |
| 6 |  Jhon Alejandro Perlaza | Colombia | + 1.04″ |
| 7 | Philip Osei | Canada | + 1.31″ |
| 8 |  Steven Solomon | Australia | + 1.41″ |