Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/09/14 10:00 | Valentin Vacherot v Constantin Bittoun Kouzmine | 6-3,5-7,6-4 |
| ITF M25 Sierre | 2021/09/03 10:00 | Valentin Vacherot v Oliver Crawford | 3-6,6-7 |
| ITF M25 Sierre | 2021/09/02 11:05 | Tristan Schoolkate v Valentin Vacherot | 4-6,2-6 |
| ITF M25 Sierre | 2021/08/31 12:20 | Christian Langmo v Valentin Vacherot | 6-7,4-6 |
| ITF M25 Caslano | 2021/08/25 08:30 | Jakub Paul v Valentin Vacherot | 6-3,7-6 |
| ITF M25 Muttenz | 2021/08/18 14:55 | Valentin Vacherot v Otto Virtanen | 1-6,3-6 |
| ITF M15 Monastir | 2021/07/22 14:00 | Valentin Vacherot v Matias Franco Descotte | 7-5,3-6,4-6 |
| ITF M15 Monastir | 2021/07/21 10:10 | Adil Kalyanpur v Valentin Vacherot | 6-4,3-6,0-6 |
| ITF M15 Sozopol | 2021/09/14 10:00 | Simeon Terziev v Dinko Dinev | 6-4,6-2 |
| UTR Pro Tennis Series - Sofia | 2021/09/02 10:00 | Simeon Terziev v Yurii Dzhavakian | 3-6,7-6,3-6 |
| UTR Pro Tennis Series - Sofia | 2021/09/01 06:30 | Simeon Terziev v Adriano Dzhenev | 6-1,6-2 |
| UTR Pro Tennis Series - Sofia | 2021/08/31 11:00 | Simeon Terziev v Veselin Kiselkov | 6-1,5-0 |
| UTR Pro Tennis Series - Sofia | 2021/08/30 10:00 | Ioan Alexandru Chirita v Simeon Terziev | 4-6,6-3,3-6 |
| ITF M25 Pitesti | 2021/08/04 05:55 | Corentin Denolly v Simeon Terziev | 6-3,7-5 |
| ITF M25 Pitesti | 2021/08/03 05:55 | Toby Martin v Simeon Terziev | 5-7,4-6 |
| ITF M15 Sofie | 2021/07/08 11:40 | Simeon Terziev v Gabriel Donev | 1-6,6-4,0-6 |