Heat 6
mercredi 8 août 2018, 10h35 GMT – 10h35 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Piero Codia | Italy | 51.59″ |
| 2 | James Guy | Great Britain | + 0.16″ |
| 3 | Mathys Goosen | Netherlands | + 0.89″ |
| 4 |  Marius Kusch | Germany | + 0.92″ |
| 5 |  Jan Switkowski | Poland | + 1.24″ |
| 6 |  Federico Burdisso | Italy | + 1.31″ |
| 7 |  Ümit Can Güres | Turkey | + 1.62″ |
| 8 |  Danas Rapšys | Lithuania | + 1.98″ |
| 9 | Pierre Henry Arrenous | France | + 2.09″ |
| 10 | Antani Ivanov | Bulgaria | + 2.27″ |