Stadium: Court 8 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/10/24 10:00 | Edouard Villoslada v Andres Haefele | 6-0,6-0 |
| ITF M15 Monastir | 2021/10/18 09:30 | Stefano Reitano v Andres Haefele | 6-2,6-0 |
| ITF M15 Monastir | 2021/10/17 08:00 | Jabari Stafford v Andres Haefele | 3-6,2-6 |
| ITF M15 Monastir | 2021/10/11 08:00 | Mirko Martinez v Andres Haefele | 6-0,6-4 |
| ITF M15 Monastir | 2021/10/04 08:00 | Kousuke Ogura v Andres Haefele | 6-3,6-1 |
| ITF M15 Monastir | 2021/10/03 08:00 | Mohamed Amine Aissa Khelifa v Andres Haefele | 3-6,6-3,7-10 |
| ITF M15 Monastir | 2021/09/26 10:30 | Andres Haefele v Tathagat Charantimath | 1-6,3-6 |
| ITF M15 Monastir | 2021/09/20 09:00 | Andres Haefele v Amaan Siddiqui | 4-6,2-6 |
| ITF M15 Monastir | 2021/10/31 13:30 | Yannick Wunderlich v Ethan Terblanche | 6-2,6-0 |
| ITF M15 Monastir | 2021/10/27 15:30 | Yannick Wunderlich v Pietro Pampanin | 3-6,4-6 |
| ITF M15 Monastir | 2021/10/26 10:00 | Pierre Antoine Tailleu v Yannick Wunderlich | 4-6,1-6 |
| ITF M15 Monastir | 2021/10/24 10:00 | Yannick Wunderlich v Christian Kuehne | 6-3,6-2 |
| ITF M25 Hamburg | 2021/10/17 08:00 | Yannick Wunderlich v Ben Jones | 0-6,2-6 |
| ITF M25 Ueberlingen | 2021/08/16 09:20 | Oscar Galimardanov v Yannick Wunderlich | 7-5,6-4 |
| ITF M25 Frankfurt am Main | 2021/08/09 09:00 | Sandro Kopp v Yannick Wunderlich | 6-3,6-4 |
| ITF M25 Wetzlar | 2021/08/02 08:00 | Yannick Wunderlich v Giles Hussey | 6-7,5-7 |