Semifinal 1
mercredi 12 décembre 2018, 13h22 GMT – 13h22 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Chad Le Clos | South Africa | 49.07″ |
| 2 |  Zhuhao Li | China | + 0.29″ |
| 3 |  Mehdy Metella | France | + 0.7″ |
| 4 | Piero Codia | Italy | + 1.16″ |
| 5 | Tomoe Zenimoto Hvas | Norway | + 1.42″ |
| 6 | Kengo Ida | Japan | + 1.47″ |
| 7 |  Deividas Margevicius | Lithuania | + 1.88″ |
| 8 | Liubomyr Lemeshko | Ukraine | + 2.46″ |