Stadium: Court 5 Round: 44 Ground: Clay
| ITF M25 Prague | 2020/09/13 10:30 | Daniel Paty v Dominik Kellovsky | 4-6,3-6 |
| Cseh Extraliga | 2019/12/18 09:00 | Jan Satral v Dominik Kellovsky | 6-3,6-2 |
| Cseh Extraliga | 2019/12/16 10:30 | Vit Kopriva v Dominik Kellovsky | 6-4,6-0 |
| Cseh Extraliga | 2019/12/13 09:00 | Dominik Kellovsky v Libor Salaba | 7-6,6-2 |
| ITF M25 Fayetteville | 2019/10/25 17:20 | Aleksandar Kovacevic v Dominik Kellovsky | 6-3,6-4 |
| ITF M25 Fayetteville | 2019/10/24 20:20 | Dominik Kellovsky v Filip Cristian Jianu | 6-3,3-6,6-2 |
| ITF M25 Fayetteville | 2019/10/23 20:35 | Murphy Cassone v Dominik Kellovsky | 2-6,1-6 |
| ITF M25 Fayetteville | 2019/10/22 15:00 | Dominik Kellovsky v Murkel Dellien | 6-4,6-4 |
| ITF M25 Prague | 2020/09/13 13:30 | Gaston Erhardt v Johan Nikles | 0-6,2-6 |
| Swiss Tennis Masters | 2020/07/08 15:15 | Marc-Andrea Huesler v Johan Nikles | 6-2,6-2 |
| Swiss Tennis Masters | 2020/07/08 10:00 | Antoine Bellier v Johan Nikles | 3-6,5-7 |
| Swiss Tennis Masters | 2020/07/07 12:30 | Yannik Steinegger v Johan Nikles | 3-6,2-6 |
| Swiss Tennis Masters | 2020/07/05 12:30 | Johan Nikles v Raphael Baltensperger | 6-1,6-3 |
| ITF M25 Naples | 2020/02/13 17:10 | Alejandro Gonzalez v Johan Nikles | 6-4,2-6,6-1 |
| ITF M25 Naples | 2020/02/11 16:50 | Johan Nikles v Nicolas Mejia | 6-2,6-4 |
| ITF M25 Palm Coast | 2020/02/06 15:00 | Johan Nikles v Martins Podzus | 4-6,3-6 |