| ITF M15 Telavi | 2021/08/04 08:45 | Evgeny Philippov v Gabriel Donev | 2-6,3-6 |
| ITF M15 Telavi | 2021/08/03 09:45 | Martin Borisiouk v Gabriel Donev | 3-6,2-6 |
| ITF M15 Novi Sad | 2021/07/30 08:00 | Gabriel Donev v Juan Pablo Paz | 4-6,5-7 |
| ITF M15 Novi Sad | 2021/07/29 09:25 | Gabriel Donev v Gorazd Srbljak | 6-2,6-4 |
| ITF M15 Novi Sad | 2021/07/28 11:10 | Ivan Nedelko v Gabriel Donev | 4-6,1-6 |
| ITF M15 Novi Sad | 2021/07/26 09:00 | Gabriel Donev v Dusan Rajic | 6-2,6-2 |
| ITF M15 Novi Sad | 2021/07/25 12:00 | Gabriel Donev v Besir Durguti | 6-1,6-1 |
| ITF M15 Sofia | 2021/07/09 08:30 | Gabriel Donev v Alexander Weis | 6-4,3-6,6-7 |
| German Premier League | 2020/07/27 17:05 | Paul Valsecchi v Johann Willems | 1-6,7-5,6-2 |
| ITF M15 Monastir | 2020/03/09 13:30 | Johann Willems v Paras Dahiya | 3-6,6-2,6-10 |
| ITF M15 Monastir | 2020/03/09 08:00 | Johann Willems v Lewie Lane | 6-4,6-4 |
| ITF M15 Monastir | 2020/03/08 08:00 | Adil Kalyanpur v Johann Willems | 2-6,2-6 |
| Challenger Koblenz | 2020/02/17 09:00 | Lucas Gerch v Johann Willems | 6-1,6-7,6-1 |
| ITF M25 Nussloch | 2020/01/20 09:00 | Robin Stanek v Johann Willems | 7-5,6-0 |
| ITF M25 Nussloch | 2020/01/19 09:00 | Flemming Peters v Johann Willems | 2-6,0-6 |
| ITF M15 Bad Salzdetfurth | 2019/10/08 11:00 | Jeremy Schifris v Johann Willems | 3-6,6-3,10-3 |