Stadium: CC Round: 25 Ground: Clay
| 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 |
| ITF M15 Vejle | 2021/07/25 11:00 | Yannik Steinegger v Johannes Ingildsen | 6-4,6-2 |
| ITF M25 Marburg | 2021/07/07 08:45 | Yannik Steinegger v Sidane Pontjodikromo | 0-6,6-7 |
| ITF M25 Marburg | 2021/07/06 12:30 | Andres Gabriel Ciurletti v Yannik Steinegger | 1-6,7-6,3-10 |
| ITF M25 Marburg | 2021/07/05 10:25 | Liam Gavrielides v Yannik Steinegger | 6-1,3-6,9-11 |
| ITF M25 Ueberlingen | 2021/08/20 14:45 | Louis Wessels v Henri Squire | 4-6,6-2,4-6 |
| ITF M25 Ueberlingen | 2021/08/19 10:35 | Louis Wessels v Milan Welte | 6-4,6-3 |
| ITF M25 Ueberlingen | 2021/08/18 15:00 | Louis Wessels v Oscar Galimardanov | 6-4,6-2 |
| ITF M25 Frankfurt am Main | 2021/08/13 14:00 | Lucas Gerch v Louis Wessels | 3-6,6-3,6-4 |
| ITF M25 Frankfurt am Main | 2021/08/12 08:55 | Sandro Kopp v Louis Wessels | 1-6,1-6 |
| ITF M25 Frankfurt am Main | 2021/08/11 10:45 | Yan Sabanin v Louis Wessels | 1-6,0-6 |
| ITF M25 Wetzlar | 2021/08/06 13:45 | Louis Wessels v Harold Mayot | 5-7,4-6 |
| ITF M25 Wetzlar | 2021/08/05 09:00 | Louis Wessels v Matthew Romios | 6-3,6-1 |