Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/10/11 10:00 | Yannik Steinegger v Ainius Sabaliauskas | 6-3,6-2 |
| ITF M15 Sozopol | 2021/10/10 13:30 | Yannik Steinegger v Sebastian Bahamondes | 6-1,6-2 |
| ITF M15 Sozopol | 2021/10/07 07:00 | Yan Bondarevskiy v Yannik Steinegger | 6-3,6-4 |
| ITF M15 Sozopol | 2021/10/06 07:00 | Dan Alexandru Tomescu v Yannik Steinegger | 3-6,6-7 |
| ITF M25 Sierre | 2021/09/02 10:45 | Remy Bertola v Yannik Steinegger | 6-4,6-3 |
| ITF M25 Sierre | 2021/09/01 11:35 | Yannik Steinegger v Alexander Weis | 6-7,7-6,6-3 |
| ITF M25 Trier | 2021/08/25 11:00 | Yannik Steinegger v Louis Wessels | 5-7,3-6 |
| ITF M25 Trier | 2021/08/23 14:45 | Yannik Steinegger v Alex Knaff | 6-3,6-1 |
| ITF M15 Sozopol | 2021/10/11 10:00 | Nikolay Nedelchev v Michael Gloeckler | 6-0,6-3 |
| ITF M15 Sozopol | 2021/10/06 07:00 | Tim Handel v Nikolay Nedelchev | 6-4,6-4 |
| ITF M15 Sozopol | 2021/10/05 06:30 | Nikolay Nedelchev v Michael Gloeckler | 6-0,6-3 |
| ITF M15 Sozopol | 2021/10/04 07:00 | Nikolay Nedelchev v Martin Iliev | 4-6,6-0,10-4 |
| ITF M15 Sozopol | 2021/10/03 08:00 | Alessandro Procopio v Nikolay Nedelchev | 4-6,4-6 |
| ITF M15 Sozopol | 2021/09/14 07:00 | Richard Biagiotti v Nikolay Nedelchev | 6-2,7-5 |
| ITF M15 Sozopol | 2021/09/13 08:00 | Nikolay Nedelchev v Dian Nedev | 6-3,6-1 |
| ITF M15 Valldoreix | 2020/11/10 09:00 | Alexander Weis v Nikolay Nedelchev | 6-3,7-5 |