Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 - Wetzlar | 2021/08/02 09:30 | Gabriel Alejandro Hidalgo v Julien Penzlin | 6-1,7-5 |
| ITF M15 Poprad | 2021/07/08 10:05 | Ignacio Monzon v Julien Penzlin | 7-5,6-2 |
| ITF M15 Poprad | 2021/07/07 11:30 | Julien Penzlin v Samuel Puskar | 6-4,7-6 |
| ITF M15 - Šibenik | 2021/05/18 08:30 | Duje Kekez v Julien Penzlin | 6-3,6-2 |
| ITF M15 - Šibenik | 2021/05/17 09:30 | Julien Penzlin v Zsombor Velcz | 6-4,6-1 |
| ITF M15 - Šibenik | 2021/05/16 07:30 | Marino Jakic v Julien Penzlin | 1-6,4-6 |
| ITF - M15 Monastir | 2021/04/26 08:00 | Julien Penzlin v Arthur Bouquier | 5-7,6-2,7-10 |
| ITF - M15 Monastir | 2021/04/25 09:30 | Daniel O'Neill v Julien Penzlin | 3-6,3-6 |
| ITF M25 - Frankfurt am Main | 2021/08/10 08:30 | Sandro Kopp v Dominik Fritsche | 6-4,6-3 |
| ITF M25 - Frankfurt am Main | 2021/08/09 09:00 | Sandro Kopp v Yannick Wunderlich | 6-3,6-4 |
| ITF M15 - Frederiksberg | 2021/08/05 08:00 | Sandro Kopp v Vasil Kirkov | 6-4,3-6,1-6 |
| ITF M15 - Frederiksberg | 2021/08/03 10:55 | Guy Den Ouden v Sandro Kopp | 4-6,4-6 |
| ITF M15 - Vejle | 2021/07/29 08:00 | Matias Zukas v Sandro Kopp | 6-3,6-1 |
| ITF M15 - Vejle | 2021/07/27 08:00 | Elmer Moller v Sandro Kopp | 0-6,5-7 |
| ITF M25 - Kottingbrunn | 2021/07/22 08:00 | Giovanni Fonio v Sandro Kopp | 6-1,7-5 |
| ITF M25 - Kottingbrunn | 2021/07/21 12:05 | Taiyo Yamanaka v Sandro Kopp | 1-6,2-6 |