Stadium: Court 3 Round: 44 Ground: Clay
| 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 M25 Bourg-en-Bresse | 2021/06/30 07:00 | Maik Steiner v Clement Tabur | 4-6,2-6 |
| ITF M25 Bourg-en-Bresse | 2021/06/28 09:00 | Yann Marti v Maik Steiner | 6-3,2-6,9-11 |
| ITF M25 Bourg-en-Bresse | 2021/06/27 09:40 | Theo Arribage v Maik Steiner | 2-6,6-2,8-10 |
| ITF M25 Klosters | 2021/06/20 07:00 | Gian Luca Tanner v Maik Steiner | 6-4,6-2 |
| ITF M15 Huy | 2021/08/22 09:05 | Sebastian Santibanez v Louis Cabay | 6-1,6-1 |
| ITF M25 Ueberlingen | 2021/08/17 09:15 | Oscar Galimardanov v Sebastian Santibanez | 6-3,6-0 |
| ITF M25 Ueberlingen | 2021/08/16 13:45 | Sebastian Santibanez v Tarun Anirudh Chilakalapudi | 6-3,6-2 |
| ITF Chile F3 | 2015/04/11 16:00 | Emilio Samhan v Sebastian Santibanez | 1-6,0-6 |