Stadium: Court 4 Round: 44 Ground: Clay
| ITF M15 Chornomorsk | 2021/08/29 09:30 | Maik Steiner v Massimo Brambati | 6-0,4-6,10-6 |
| ITF M15 Huy | 2021/08/25 11:00 | Arnaud Bovy v Maik Steiner | 7-5,0-6,6-3 |
| ITF M15 Huy | 2021/08/24 08:00 | Maik Steiner v Niels P Van Noord | 6-1,6-1 |
| ITF M15 Huy | 2021/08/23 13:50 | Maik Steiner v Sebastian Santibanez | 6-3,6-0 |
| ITF M15 Huy | 2021/08/22 07:45 | Maik Steiner v Max Van Nunen | 6-3,6-3 |
| ITF M25 Marburg | 2021/07/07 09:00 | Maik Steiner v Arnaud Bovy | 6-3,6-7,6-7 |
| ITF M25 Marburg | 2021/07/06 12:30 | Christoph Negritu v Maik Steiner | 7-6,5-7,8-10 |
| ITF M25 Marburg | 2021/07/05 10:05 | Lawrence Bataljin v Maik Steiner | 4-6,3-6 |
| ITF M15 Novomoskovsk | 2021/05/23 10:30 | Myroslav Bondar v Aleksandr Braynin | 4-6,1-6 |