Heat 7
lundi 17 mai 2021, 09h18 GMT – 09h18 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Adam Peaty | Great Britain | 58.26″ |
| 2 |  Nicolò Martinenghi | Italy | + 0.62″ |
| 3 | Kirill Prigoda | Russia | + 1.17″ |
| 4 | Alessandro Pinzuti | Italy | + 1.19″ |
| 5 | Caba Siladji | Serbia | + 1.88″ |
| 6 | Danil Semyaninov | Russia | + 1.96″ |
| 7 |  Erik Persson | Sweden | + 1.97″ |
| 8 | Caspar Corbeau | Netherlands | + 2.26″ |
| 9 | Aleksandr Zhigalov | Russia | + 2.38″ |
| 10 | Christopher Rothbauer | Austria | + 2.65″ |