Semifinal 2
lundi 30 septembre 2019, 19h50 GMT – 19h50 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Noah Lyles | United States | 19.86″ |
| 2 |  Alex Quinonez | Ecuador | + 0.09″ |
| 3 |  Zhenye Xie | China | + 0.17″ |
| 4 |  Yancarlos Martínez | Dominican Republic | + 0.42″ |
| 5 |  Brendon Rodney | Canada | + 0.48″ |
| 6 | Andre Ewers | Jamaica | + 0.75″ |
| 7 | Eseosa Desalu | Italy | + 0.87″ |
| Miguel Francis | Great Britain | DNF |