Stadium: MTA 08 Round: 62 Ground: Clay
| ITF - M15 - Antalya | 2021/10/12 07:00 | Lukas Palovic v Denis Klok | 4-6,6-0,6-3 |
| ITF - M25 Skopje | 2021/09/28 11:15 | Denis Klok v Andrey Chepelev | 2-6,1-6 |
| ITF - M15 Pirot | 2021/09/23 08:00 | Denis Klok v Kristijan Juhas | 1-6,0-6 |
| ITF - M15 Zlatibor | 2021/09/14 09:30 | Denis Klok v Lukas Palovic | 3-6,3-6 |
| ITF - M25 Denia | 2021/07/25 08:00 | Denis Klok v Lorenzo Joaquin Rodriguez | 6-7,1-6 |
| ITF - M25 Gandia | 2021/07/19 09:00 | Denis Klok v Nacho Serra Sanchez | 6-7,6-0,2-10 |
| ITF - M25 Gandia | 2021/07/18 07:00 | Denis Klok v Hans Albert Schubert | 6-3,6-2 |
| ITF - M15 Sofia | 2021/07/07 07:00 | Denis Klok v Aleksandr Braynin | 4-6,3-6 |
| ITF - M15 - Antalya | 2021/10/11 07:00 | Gabriel Ciro Da Silva v Sven Corbinais | 4-6,6-1,10-2 |
| ITF - M15 - Antalya | 2021/10/10 07:00 | Sven Corbinais v Doruk Turknas | 6-0,7-5 |
| ITF - M15 Žilina | 2021/08/30 11:30 | Dominik Kellovsky v Sven Corbinais | 3-6,6-2,10-6 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/09 12:45 | Christoph Negritu v Sven Corbinais | 6-1,6-1 |
| ITF - M15 - Antalya | 2021/04/25 07:00 | Mattia Rossi v Sven Corbinais | 6-3,6-4 |
| ITF - M15 - Antalya | 2021/02/22 07:00 | Sven Corbinais v Cengiz Aksu | 1-6,4-6 |
| ITF - M15 - Antalya | 2021/02/14 06:00 | Facundo Juarez v Sven Corbinais | 6-1,6-1 |
| ITF - M15 - Antalya | 2021/01/17 09:00 | Jonathan Mridha v Sven Corbinais | 6-2,6-1 |