Stadium: Court 5 N Round: 25 Ground: Hardcourt outdoor
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/15 14:00 | Kirkov, Vasil v Shabaz, Michael | 3-6,6-1,7-10 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/14 15:00 | Kirkov, Vasil v Smith, Errol | 6-4,6-4 |
| ITF - M15 Héraklion | 2020/11/26 07:30 | Patten, Henry v Kirkov, Vasil | 6-4,6-1 |
| ITF - M15 Héraklion | 2020/11/25 09:55 | Kirkov, Vasil v Lucas Catarina | 2-6,6-2,6-4 |
| ITF - M15 Héraklion | 2020/11/18 12:15 | Kirkov, Vasil v Sho Shimabukuro | 2-6,6-3,4-6 |
| ITF - M15 Héraklion | 2020/11/17 07:30 | Kirkov, Vasil v Billy Harris | 4-6,6-0,10-7 |
| ITF - M15 Héraklion | 2020/11/16 07:30 | Kirkov, Vasil v Gianmarco Ferrari | 4-6,6-2,10-2 |
| ITF - M15 Héraklion | 2020/11/15 08:00 | Kirkov, Vasil v Cezar Cretu | 6-4,6-3 |
| ITF M15 Champaign | 2021/06/22 15:00 | Seelig, Kyle v Jose Pereira | 7-6,7-6 |
| ITF M15 Champaign | 2021/06/21 15:00 | Seelig, Kyle v Harper, Cleeve | 6-2,6-1 |
| ITF - M25 Santo Domingo | 2021/06/09 14:55 | Seelig, Kyle v Conner Huertas Del Pino | 6-3,2-6,2-6 |
| ITF - M25 Santo Domingo | 2021/06/08 14:20 | Seelig, Kyle v Eguez, Sebastian | 6-3,6-2 |
| ITF - M25 Santo Domingo | 2021/06/06 13:00 | Seelig, Kyle v Aydan Gomez Osorio | 6-0,6-0 |
| ITF - M25 Santo Domingo | 2021/06/04 13:00 | Aidan Mchugh v Seelig, Kyle | 6-4,6-2 |
| ITF - M25 Santo Domingo | 2021/06/03 15:55 | Seelig, Kyle v Hidalgo, Diego | 6-2,6-4 |
| ITF - M25 Santo Domingo | 2021/06/02 13:25 | Seelig, Kyle v Wilson Leite | 6-2,6-2 |