Semifinal 1
Friday, July 26, 2019,6:10am| Name | Team | Times | |
|---|---|---|---|
| 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″ |