Stadium: Court 1 Round: 19 Ground: Clay
| Challenger Prostejov | 2021/06/13 09:00 | Uladzimir Ignatik v Alex Rybakov | 4-6,5-7 |
| ITF M15 Skopje | 2021/06/03 09:30 | Ryan Nijboer v Alex Rybakov | 2-6,7-6,6-4 |
| ITF M15 Skopje | 2021/06/02 08:00 | Kalin Ivanovski v Alex Rybakov | 2-6,2-6 |
| ITF M25 Most | 2021/05/29 08:30 | Dalibor Svrcina v Alex Rybakov | 6-2,6-2 |
| ITF M25 Most | 2021/05/28 08:30 | Daniel Michalski v Alex Rybakov | 4-6,4-6 |
| ITF M25 Most | 2021/05/27 08:00 | Alex Rybakov v Filip Peliwo | 6-1,6-2 |
| ITF M25 Most | 2021/05/26 07:55 | Alex Rybakov v Martin Damm | 6-4,6-2 |
| ITF M25 Vic | 2021/05/18 08:00 | Alex Rybakov v Pedro Vives Marcos | 2-6,4-6 |
| Challenger Prostejov | 2021/06/13 11:25 | Adam Jurajda v Jeroen Vanneste | 6-4,6-7,1-6 |
| ITF M15 Antalya | 2021/05/05 08:25 | Jeroen Vanneste v Yanki Erel | 7-6,5-7,5-7 |
| ITF M15 Antalya | 2021/05/02 09:20 | Sandro Ehrat v Jeroen Vanneste | 4-6,3-6 |
| ITF M15 Antalya | 2021/05/01 07:30 | Peter Heller v Jeroen Vanneste | 3-6,3-6 |
| ITF M15 Antalya | 2021/04/30 07:15 | Oleksii Krutykh v Jeroen Vanneste | 4-6,6-1,1-6 |
| ITF M15 Antalya | 2021/04/29 10:10 | Jacopo Berrettini v Jeroen Vanneste | 4-6,0-6 |
| ITF M15 Antalya | 2021/04/28 10:10 | Daniil Glinka v Jeroen Vanneste | 1-6,1-6 |
| ITF M15 Antalya | 2021/04/23 07:00 | Jeroen Vanneste v Fabian Marozsan | 3-6,2-6 |