Semifinal
mercredi 8 août 2018, 18h17 GMT – 18h17 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  László Cseh | Hungary | 51.65″ |
| 2 |  Aleksandr Sadovnikov | Russia | + 0.02″ |
| 3 |  Konrad Czerniak | Poland | + 0.09″ |
| 4 | Kristóf Milák | Hungary | + 0.11″ |
| 5 | James Guy | Great Britain | + 0.13″ |
| 6 | Egor Kuimov | Russia | + 0.3″ |
| 7 |  Mehdy Metella | France | + 0.32″ |
| 8 | Piero Codia | Italy | + 0.37″ |
| 9 | Joeri Verlinden | Netherlands | + 0.51″ |
| 10 |  Yauhen Tsurkin | Belarus | + 0.56″ |
| 11 |  Marius Kusch | Germany | + 0.58″ |
| 12 | Liubomyr Lemeshko | Ukraine | + 0.69″ |
| 13 | Philip Heintz | Germany | + 0.76″ |
| 14 | Mathys Goosen | Netherlands | + 0.93″ |
| 15 | Jan Switkowski | Poland | + 1.58″ |
| 16 | Matteo Rivolta | Italy | + 1.77″ |