Semifinal 1
samedi 29 juillet 2017, 18h45 GMT – 18h45 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Camille Lacourt | France | 24.3″ |
| 2 |  Matt Grevers | United States | + 0.35″ |
| 3 | Pavel Sankovich | Belarus | + 0.44″ |
| 4 | Jonatan Kopelev | Israel | + 0.54″ |
| 5 | Grigory Tarasevich | Russia | + 0.56″ |
| 6 |  Guilherme Guido | Brazil | + 0.61″ |
| 7 | Young-Jun Won | Korea | + 0.72″ |
| 8 | I Gede Siman Sudartawa | Indonesia | + 0.74″ |