Semifinal 1
vendredi 26 juillet 2019, 13h10 GMT – 13h10 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Kristóf Milák | Hungary | 50.95″ |
| 2 |  Chad Le Clos | South Africa | + 0.45″ |
| 3 |  Marius Kusch | Germany | + 0.55″ |
| 4 |  Matthew Temple | Australia | + 0.75″ |
| 5 |  Naoki Mizunuma | Japan | + 0.76″ |
| 6 |  Vinicius Lanza | Brazil | + 0.97″ |
| 7 |  Zhuhao Li | China | + 1.05″ |
| 8 | David Morgan | Australia | + 1.25″ |