Stadium: Court 1 Round: 28 Ground: Hardcourt indoor
| ITF M25 Falun | 2021/09/30 14:20 | Antoine Escoffier v Vasil Kirkov | 6-3,4-6,4-6 |
| ITF M25 Falun | 2021/09/29 15:20 | Vasil Kirkov v Leopold Zima | 6-4,6-4 |
| ITF M25 Falun | 2021/09/27 12:00 | Sergey Fomin v Vasil Kirkov | 3-6,2-6 |
| ITF M25 Plaisir | 2021/09/17 11:30 | Thomas Laurent v Vasil Kirkov | 6-7,1-6 |
| ITF M25 Plaisir | 2021/09/16 07:55 | Vasil Kirkov v Marvin Moeller | 2-6,7-6,7-6 |
| 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 M25 Falun | 2021/09/30 12:30 | Yuta Shimizu v Shintaro Imai | 7-6,6-7,4-6 |
| ITF M25 Falun | 2021/09/29 11:00 | Leandro Riedi v Shintaro Imai | 6-3,1-6,4-6 |
| ITF M25 Falun | 2021/09/28 12:40 | Jakub Paul v Shintaro Imai | 3-6,0-6 |
| ITF M25 Jonkoping | 2021/09/24 09:35 | Viktor Durasovic v Shintaro Imai | 7-5,7-6 |
| ITF M25 Jonkoping | 2021/09/23 09:30 | Shintaro Imai v Filip Bergevi | 6-4,7-6 |
| ITF M25 Jonkoping | 2021/09/22 11:45 | Shintaro Imai v Valentin Royer | 6-4,6-3 |
| ITF M25 Jonkoping | 2021/09/21 14:45 | Shintaro Imai v Leo Borg | 6-3,6-2 |
| ITF M25 Sintra | 2021/09/16 11:05 | Alejandro Moro Canas v Shintaro Imai | 6-7,6-1,6-3 |