Stadium: Court 3 Round: 54 Ground: Hardcourt indoor
| ITF M15 Sozopol | 2021/10/13 09:00 | Yannik Steinegger v Nikolay Nedelchev | 6-4,4-6,5-10 |
| 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 Budapešť | 2021/09/28 09:40 | Buvaysar Gadamauri v Christopher Patzanovsky | 6-1,6-2 |
| ITF M25 Budapešť | 2021/09/27 10:25 | Christopher Patzanovsky v Zalan Sandor Savay | 6-3,6-1 |
| ITF M25 Pardubice | 2021/09/20 09:00 | Christopher Patzanovsky v Stefanos Sakellaridis | 6-4,1-6,7-10 |
| ITF M25 Trier | 2021/08/23 08:00 | Fred Olivier Schommer v Christopher Patzanovsky | 7-5,0-6,10-6 |
| ITF M25 Prostějov | 2021/08/17 07:55 | Marek Gengel v Christopher Patzanovsky | 6-2,6-0 |
| ITF M25 Prostějov | 2021/08/16 09:40 | Christopher Patzanovsky v Vojtech Mares | 6-2,6-0 |
| ITF M25 Prostějov | 2021/08/15 09:00 | Christopher Patzanovsky v Peter Samosi | 6-0,6-1 |
| ITF M15 Frederiksberg | 2021/08/02 08:50 | Adam Heinonen v Christopher Patzanovsky | 3-6,4-6 |