| UTR Pro Tennis Series Hillerod | 2022/02/15 15:30 | Ivan Penev v David Perez Sanz | 4-6,4-6 |
| UTR Pro Tennis Series Hillerod | 2022/02/14 14:00 | Ricardo Villacorta-Alonso v Ivan Penev | 6-2,2-6,6-3 |
| UTR Pro Tennis Series Zadar | 2021/11/19 13:50 | Ivan Penev v Alexander Lazov | 6-3,3-6,3-6 |
| UTR Pro Tennis Series Zadar | 2021/11/16 10:30 | Ivan Penev v Oleksii Osadchyi | 6-1,6-1 |
| UTR Pro Tennis Series Zadar | 2021/11/15 13:30 | Ivan Penev v Vladan Tadic | 4-6,6-4,0-6 |
| UTR Pro Tennis Series Zadar | 2021/11/14 12:00 | Alen Rogic-Hadzalic v Ivan Penev | 6-3,4-6,6-2 |
| ITF M15 Sozopol | 2021/10/11 09:00 | Ivan Penev v Berk Ilkel | 6-7,6-1,8-10 |
| ITF M15 Sozopol | 2021/10/10 09:00 | Ivan Penev v Gianluca Coloma-Heck | 6-1,6-3 |
| UTR Pro Tennis Series Hillerod | 2022/02/14 18:00 | Sebastian Grundtvig Jorgensen v Nikolaj Katic | 7-5,5-2 |
| ITF M15 Antalya | 2022/01/13 11:00 | Juan P Canas Garcia v Nikolaj Katic | 6-4,6-0 |
| ITF M15 Parnu | 2021/10/26 08:00 | Raffael Schaer v Nikolaj Katic | 7-5,6-4 |
| UTR Pro Tennis Series Copenhagen | 2021/10/23 07:00 | Nikolaj Katic v Jose Antonio Rodriguez Rodriguez | 6-7,2-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/21 07:00 | Nikolaj Katic v Felipe Mikkelsen | 6-4,6-2 |
| UTR Pro Tennis Series Copenhagen | 2021/10/20 13:15 | Nikolaj Katic v Vilhelm Fridell | 5-7,6-4,1-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/19 11:30 | Nikolaj Katic v Yurii Dzhavakian | 4-6,4-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/18 11:30 | Nikolaj Katic v Henrik Heise Korsgaard | 1-6,6-3,6-4 |