Semifinal
mardi 23 juillet 2019, 13h41 GMT – 13h41 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Adam Peaty | Great Britain | 26.11″ |
| 2 |  Felipe Lima | Brazil | + 0.51″ |
| 3 | Fabio Scozzoli | Italy | + 0.59″ |
| 4 |  Ilya Shymanovich | Belarus | + 0.66″ |
| 5 | João Gomes Júnior | Brazil | + 0.73″ |
| 6 |  Zibei Yan | China | + 0.75″ |
| 7 |  Michael Andrew | United States | + 0.77″ |
| 8 | Kirill Prigoda | Russia | + 0.97″ |
| 9 |  Tobias Bjerg | Denmark | + 0.97″ |
| 10 |  Darragh Greene | Ireland | + 1.03″ |
| 11 | Emre Sakçi | Turkey | + 1.06″ |
| 11 | Andrey Nikolaev | Russia | + 1.06″ |
| 13 | Yasuhiro Koseki | Japan | + 1.11″ |
| 14 |  Nicolò Martinenghi | Italy | + 1.2″ |
| 14 | Nikola Obrovac | Croatia | + 1.2″ |
| 16 | Ties Elzerman | Netherlands | + 1.5″ |