Stadium: B & B Court Round: 14 Ground: Clay
| ITF M25 Wetzlar | 2021/08/05 10:40 | Harold Mayot v Ivan Nedelko | 3-6,6-2,6-4 |
| ITF M25 Wetzlar | 2021/08/03 16:30 | Jan Soeren Hain v Ivan Nedelko | 2-6,2-6 |
| ITF M15 Novi Sad | 2021/07/28 11:10 | Ivan Nedelko v Gabriel Donev | 4-6,1-6 |
| Challenger Nur-Sultan | 2021/07/20 04:00 | Dostanbek Tashbulatov v Ivan Nedelko | 3-6,2-6 |
| ITF M25 Marburg | 2021/07/07 14:35 | Ivan Nedelko v Nick Hardt | 5-7,7-6,4-6 |
| Challenger Almaty | 2021/06/06 06:45 | Benjamin Hassan v Ivan Nedelko | 6-2,6-2 |
| ITF M15 Novomoskovsk | 2021/06/03 12:15 | Ivan Nedelko v Aidan Mayo | 6-2,6-3 |
| ITF M15 Novomoskovsk | 2021/05/28 07:15 | Ivan Nedelko v Carlos Sanchez Jover | 4-6,3-6 |
| Challenger - Segovia | 2021/07/27 13:05 | Altug Celikbilek v Johannes Haerteis | 6-3,6-4 |
| Challenger Pozoblanco | 2021/07/20 20:10 | Cem Ilkel v Johannes Haerteis | 6-2,7-6 |
| Challenger Amersfoort | 2021/07/13 08:30 | Mats Moraing v Johannes Haerteis | 6-1,6-0 |
| Challenger Braunschweig | 2021/07/04 11:55 | Johannes Haerteis v Nino Ehrenschneider | 6-3,3-6,4-6 |
| Challenger Prostejov | 2021/06/15 08:30 | Johannes Haerteis v Federico Coria | 1-6,0-6 |
| Challenger Prostejov | 2021/06/14 08:30 | Johannes Haerteis v David Poljak | 5-7,3-6 |
| Challenger Prostejov | 2021/06/13 09:00 | Johannes Haerteis v Jakub Nicod | 6-3,3-6,6-3 |
| Challenger Bratislava | 2021/06/06 14:15 | Skander Mansouri v Johannes Haerteis | 6-3,7-5 |