Stadium: Center Round: 44 Ground: Clay
| ITF - M25 Jablonec nad Nisou | 2020/09/20 09:00 | Jiri Barnat v Dominik Kellovsky | 5-7,3-6 |
| ITF - M25 Praag | 2020/09/15 09:35 | Pawel Juszczak v Dominik Kellovsky | 6-1,6-2 |
| ITF - M25 Praag | 2020/09/14 09:00 | Dominik Kellovsky v Johan Nikles | 6-4,6-3 |
| ITF - M25 Praag | 2020/09/13 10:30 | Daniel Paty v Dominik Kellovsky | 4-6,3-6 |
| Tsjechië - Extraliga | 2019/12/18 09:00 | Jan Satral v Dominik Kellovsky | 6-3,6-2 |
| Tsjechië - Extraliga | 2019/12/16 10:30 | Vit Kopriva v Dominik Kellovsky | 6-4,6-0 |
| Tsjechië - 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 Jablonec nad Nisou | 2020/09/20 09:00 | Gaston Erhardt v Ryan Nijboer | 1-6,1-6 |
| ITF M15 - Curtea de Argeș | 2020/09/16 10:10 | Ryan Nijboer v Max Houkes | 2-6,6-4,5-7 |
| ITF M15 - Alkmaar | 2020/08/26 11:35 | Ryan Nijboer v Clement Geens | 3-6,5-7 |
| ITF - M15 Doha | 2020/03/11 16:20 | Kai Wehnelt v Ryan Nijboer | 2-6,6-4,6-4 |
| ITF - M15 Sharm-el-Sheikh | 2020/02/27 09:00 | Ryan Nijboer v David Poljak | 2-6,4-6 |
| ITF - M15 Sharm-el-Sheikh | 2020/02/26 10:30 | Ryan Nijboer v Lorenzo Rottoli | 6-3,6-1 |
| ITF - M15 Sharm-el-Sheikh | 2020/02/21 07:55 | Pablo Vivero Gonzalez v Ryan Nijboer | 6-3,7-5 |
| ITF - M15 Sharm-el-Sheikh | 2020/02/20 09:50 | Kelsey Stevenson v Ryan Nijboer | 3-6,7-6,3-6 |