Stadion: Court 4 Round: 26 Ground: Hardcourt indoor
| ITF - M25 - Plaisir | 2021/09/14 10:35 | Vasil Kirkov v Melvin Manuel | 6-4,6-2 |
| Challenger - Banja Luka | 2021/09/05 10:50 | Vasil Kirkov v Mircea-Alexandru Jecan | 4-6,4-6 |
| ITF - M15 - Ulcinj | 2021/09/02 10:10 | Ignacio Carou v Vasil Kirkov | 3-6,6-1,6-4 |
| ITF - M15 - Ulcinj | 2021/08/31 10:20 | Luca Teboul v Vasil Kirkov | 1-6,1-6 |
| ITF - M15 - Bratislava | 2021/08/28 08:55 | Mate Valkusz v Vasil Kirkov | 7-5,6-4 |
| ITF - M15 - Bratislava | 2021/08/27 08:00 | Vasil Kirkov v Biagio Gramaticopolo | 7-5,6-1 |
| ITF - M15 - Bratislava | 2021/08/26 07:55 | Vasil Kirkov v Simon Freund | 6-0,6-1 |
| ITF - M15 - Bratislava | 2021/08/24 10:00 | Vasil Kirkov v Diego F Flores | 6-3,6-3 |
| ITF - M25 - Plaisir | 2021/09/14 10:50 | Lisandru Rodriguez v Marvin Moeller | 1-6,0-6 |
| ITF - M25 - Trier | 2021/08/28 15:00 | Tim Handel v Marvin Moeller | 7-5,2-6,6-2 |
| ITF - M25 - Trier | 2021/08/27 12:00 | Marvin Moeller v Mick Veldheer | 6-3,6-3 |
| ITF - M25 - Trier | 2021/08/26 15:00 | Marvin Moeller v Marlon Vankan | 6-2,7-5 |
| ITF - M25 - Trier | 2021/08/25 09:00 | Marvin Moeller v Leopold Zima | 6-1,7-5 |
| Challenger - Lüdenscheid | 2021/08/17 15:35 | Matteo Martineau v Marvin Moeller | 6-0,6-2 |
| Challenger - Meerbusch | 2021/08/09 09:30 | Jesper De Jong v Marvin Moeller | 6-1,6-4 |
| Challenger - Meerbusch | 2021/08/08 09:10 | Marvin Moeller v Benjamin Hassan | 5-7,7-5,6-3 |