Stadium: CC Round: 26 Ground: Clay
| ITF - M25 Frankfurt nad Mohanom | 2021/08/12 08:55 | Sandro Kopp v Louis Wessels | 1-6,1-6 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/11 09:00 | Julien Penzlin v Sandro Kopp | 4-6,3-6 |
| ITF - M25 Frankfurt nad Mohanom | 2021/08/10 08:30 | Sandro Kopp v Dominik Fritsche | 6-4,6-3 |
| ITF - M25 Frankfurt nad Mohanom | 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 Trier | 2021/08/25 09:00 | Max Wiskandt v Raphael Calzi | 7-5,4-6,2-6 |
| ITF - M25 Koksijde | 2021/08/16 09:40 | Raphael Calzi v Olivier Rojas | 3-6,7-5,4-10 |
| ITF - M25 Koksijde | 2021/08/15 08:00 | Charles Minc v Raphael Calzi | 6-3,2-6,0-10 |
| ITF - M15 Frederiksberg | 2021/08/01 08:00 | Gianni Ross v Raphael Calzi | 7-5,6-4 |
| ITF - M15 Esch/Alzette | 2021/07/20 12:55 | Guillaume Dermiens v Raphael Calzi | 1-6,6-4,6-4 |
| Davis Cup | 2021/06/19 09:35 | Egill Sigurdsson v Raphael Calzi | 4-6,0-6 |
| Davis Cup | 2021/06/17 09:05 | Raphael Calzi v Liam Delicata | 6-3,6-4 |
| ITF - M15 Monastir | 2021/04/04 10:30 | Igor Marcondes v Raphael Calzi | 7-6,7-6 |