Stadium: Court 8 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/10/06 06:45 | Yan Bondarevskiy v George Lazarov | 6-7,6-1,6-3 |
| Challenger Sibiu | 2021/09/30 10:40 | Stefano Travaglia v Yan Bondarevskiy | 6-3,6-2 |
| Challenger Sibiu | 2021/09/28 10:45 | Yan Bondarevskiy v Vlad Andrei Dancu | 6-2,6-3 |
| Challenger Sibiu | 2021/09/27 07:00 | Oleg Prihodko v Yan Bondarevskiy | 6-7,4-6 |
| Challenger Sibiu | 2021/09/26 07:30 | Yan Bondarevskiy v David Poljak | 7-5,3-6,6-3 |
| ITF M15 Vyškovo | 2021/09/21 07:00 | Yan Bondarevskiy v Tommaso Compagnucci | 2-6,7-6,5-7 |
| ITF M15 Zlatibor | 2021/09/18 11:30 | Fabian Marozsan v Yan Bondarevskiy | 6-4,6-3 |
| ITF M15 Zlatibor | 2021/09/17 10:55 | Yan Bondarevskiy v Zsombor Velcz | 6-4,6-1 |
| 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 M25 Muttenz | 2021/08/18 14:50 | Yannik Steinegger v Calvin Hemery | 6-7,1-6 |
| ITF M15 Vejle | 2021/07/28 14:35 | Yannik Steinegger v Mats Rosenkranz | 1-6,6-3,4-6 |
| ITF M15 Vejle | 2021/07/26 14:40 | Yannik Steinegger v Leonardo Catani | 5-7,6-2,10-4 |