Stadium: Court 1 Round: 29 Ground: Clay
| ITF M15 Vyshkovo | 2021/09/25 08:00 | Nedelko, Ivan v Tommaso Compagnucci | 6-2,6-7,6-4 |
| ITF M15 Vyshkovo | 2021/09/24 12:10 | Nedelko, Ivan v Oleg Prihodko | 6-1,1-6,6-2 |
| ITF M15 Vyshkovo | 2021/09/23 10:00 | Nedelko, Ivan v Romain Faucon | 6-3,7-6 |
| Challenger Meerbusch | 2021/08/09 11:20 | Nicolas Kicker v Nedelko, Ivan | 2-6,7-6,7-6 |
| Challenger Meerbusch | 2021/08/08 16:05 | Nedelko, Ivan v Haerteis, Johannes | 7-6,6-3 |
| ITF M25 Wetzlar | 2021/08/05 10:40 | Harold Mayot v Nedelko, Ivan | 3-6,6-2,6-4 |
| ITF M25 Wetzlar | 2021/08/03 16:30 | Hain, Jan Soeren v Nedelko, Ivan | 2-6,2-6 |
| ITF M15 Novi Sad | 2021/07/28 11:10 | Nedelko, Ivan v Gabriel Donev | 4-6,1-6 |
| ITF M15 Vyshkovo | 2021/09/25 08:00 | Gergely Madarasz v Georgii Kravchenko | 6-7,7-6,6-1 |
| ITF M15 Vyshkovo | 2021/09/24 10:00 | Wojcik, Yann v Gergely Madarasz | 1-6,5-7 |
| ITF M15 Vyshkovo | 2021/09/23 13:30 | Veremeychuk, Danylo v Gergely Madarasz | 2-6,0-6 |
| ITF M15 Vyshkovo | 2021/09/23 08:30 | Nico Hornitschek v Gergely Madarasz | 4-6,6-2,1-6 |
| ITF M15 Zlatibor | 2021/09/18 12:00 | Gergely Madarasz v Tepavac, Marko | 4-6,4-6 |
| ITF M15 Zlatibor | 2021/09/17 08:00 | Gergely Madarasz v Nagy, Peter | 6-3,6-7,7-5 |
| ITF M15 Zlatibor | 2021/09/16 08:00 | Gergely Madarasz v Stefan Vujic | 6-2,6-4 |
| ITF M15 Zlatibor | 2021/09/15 11:30 | Gergely Madarasz v Viktor Jovic | 6-2,6-4 |