Stadium: Show Court 8 Round: 54 Ground: Clay
| UTR Pro Tennis Series - Mulheim | 2021/07/30 13:30 | Hazem Naw v John Sperle | 6-4,6-2 |
| UTR Pro Tennis Series - Mulheim | 2021/07/30 07:00 | Hendrik Jebens v John Sperle | 4-6,6-7 |
| UTR Pro Tennis Series - Mulheim | 2021/07/29 08:30 | Marvin Schaber v John Sperle | 2-6,2-6 |
| UTR Pro Tennis Series - Mulheim | 2021/07/28 12:00 | Tim Gennes v John Sperle | 1-6,3-6 |
| UTR Pro Tennis Series - Mulheim | 2021/07/26 12:30 | Vasile Antonescu v John Sperle | 6-3,5-2 |
| ITF - M15 Antalya | 2021/05/31 08:30 | Daniel Antonio Nunez v John Sperle | 6-4,7-5 |
| ITF - M15 Antalya | 2021/05/23 07:00 | John Sperle v Jip Van Assendelft | 5-7,7-5,4-10 |
| ITF - M15 Troisdorf | 2021/05/11 10:15 | John Sperle v Aliaksandr Bulitski | 6-2,4-6,5-10 |
| ITF - M25 Wetzlar | 2021/08/02 14:00 | Osman Torski v Kai Lemstra | 6-4,0-6,10-5 |
| ITF - M15 Antalya | 2021/06/27 06:30 | Osman Torski v Thiago Cigarran | 3-6,1-6 |
| ITF - M15 Skopje | 2021/06/02 10:55 | Miljan Zekic v Osman Torski | 4-6,6-4,6-1 |
| ITF - M15 Skopje | 2021/06/01 08:00 | Luka Pavlovic v Osman Torski | 6-2,2-6,5-10 |
| ITF - M15 Skopje | 2021/05/31 11:00 | Osman Torski v Ivan Manasov | 6-2,6-2 |
| ITF - M15 Troisdorf | 2021/05/10 11:00 | Aliaksandr Bulitski v Osman Torski | 6-0,6-3 |
| ITF - M15 Troisdorf | 2021/05/09 10:00 | Osman Torski v Lucas Hellfritsch | 6-3,6-3 |
| ITF - M15 Antalya | 2021/03/24 06:30 | Osman Torski v Deney Wassermann | 3-6,6-4,7-10 |