Heat 8
mercredi 12 décembre 2018, 03h33 GMT – 03h33 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Chad Le Clos | South Africa | 49.34″ |
| 2 |  Marius Kusch | Germany | + 0.2″ |
| 3 |  Jack Conger | United States | + 0.86″ |
| 4 | Zhuhao Li | China | + 0.95″ |
| 5 | Aleksandr Kharlanov | Russia | + 1.65″ |
| 6 | Tomoe Zenimoto Hvas | Norway | + 1.7″ |
| 7 | Liubomyr Lemeshko | Ukraine | + 2.01″ |
| 8 | Hryhory Pekarski | Belarus | + 2.07″ |
| 9 | Emmanuel Vanluchene | Belgium | + 2.96″ |
| 10 | Kuan-Hung Wang | Chinese Taipei | + 3.57″ |