Stadium: Hard 20 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Torello | 2023/03/01 09:00 | Nikolay Nedelchev v Giovanni Oradini | 3-6,4-6 |
| ITF M25 Torello | 2023/02/28 09:00 | Enrico Giacomini v Nikolay Nedelchev | 5-7,1-6 |
| ITF M25 Torello | 2023/02/26 13:00 | Marc Ros Mesas v Nikolay Nedelchev | 0-6,0-6 |
| ITF M25 Faro | 2023/02/21 11:55 | Maxime Chazal v Nikolay Nedelchev | 6-3,6-4 |
| ITF M25 Faro | 2023/02/20 14:20 | Nikolay Nedelchev v Christian Sigsgaard | 6-4,2-6,10-7 |
| ITF M25 Faro | 2023/02/19 13:00 | Rodrigo Fernandes v Nikolay Nedelchev | 0-6,7-6,8-10 |
| ITF M25 Vila Real de Santo Antonio | 2023/02/15 10:30 | Billy Harris v Nikolay Nedelchev | 3-6,6-1,7-6 |
| ITF M25 Vila Real de Santo Antonio | 2023/02/14 10:55 | Matej Vocel v Nikolay Nedelchev | 6-7,2-6 |
| ITF M25 Nussloch | 2023/01/23 09:00 | Niklas Koch v Jannik Opitz | 3-6,4-6 |
| ITF M15 Trier | 2022/08/22 08:00 | Joshua Schaefer v Niklas Koch | 5-7,4-6 |
| UTR Pro Tennis Series Blaricum | 2022/04/05 12:30 | Zachary Eisinga v Niklas Koch | 5-1 |
| UTR Pro Tennis Series Blaricum | 2022/04/04 13:30 | Twan Van Zijl v Niklas Koch | 6-1,6-1 |
| UTR Pro Tennis Series Amsterdam | 2022/03/05 12:00 | Olivier Rojas v Niklas Koch | 3-6,6-1,5-4 |
| UTR Pro Tennis Series Amsterdam | 2022/03/04 09:00 | Jurriaan Bol v Niklas Koch | 6-4,1-6,6-3 |
| UTR Pro Tennis Series Amsterdam | 2022/03/03 15:05 | Teun Rozenberg v Niklas Koch | 2-6,4-6 |
| UTR Pro Tennis Series Amsterdam | 2022/03/01 10:30 | Benjamin Dhoe v Niklas Koch | 6-4,6-4 |