Stadium: Court 3 Round: 26 Ground: Clay
| ITF M25 Koksijde | 2021/08/16 08:00 | Victor Ernaelsteen v John Sperle | 3-6,3-6 |
| ITF M25 Wetzlar | 2021/08/03 15:30 | John Sperle v Osman Torski | 3-6,3-6 |
| 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 M25 Koksijde | 2021/08/18 09:00 | Tibo Colson v Simon Carr | 3-6,6-1,3-6 |
| ITF M25 Idanha-A-Nova | 2021/07/25 08:55 | Simon Carr v Alejandro Moro Canas | 6-7,4-6 |
| ITF M25 Idanha-A-Nova | 2021/07/24 08:30 | Gilbert S K Junior v Simon Carr | 2-6,6-7 |
| ITF M25 Idanha-A-Nova | 2021/07/23 09:00 | Simon Carr v Alafia Ayeni | 6-2,6-4 |
| ITF M25 Idanha-A-Nova | 2021/07/22 08:00 | Sho Shimabukuro v Simon Carr | 6-7,6-4,2-6 |
| ITF M25 Idanha-A-Nova | 2021/07/20 11:15 | Simon Carr v Duarte Vale | 6-4,7-6 |
| ITF M25 Idanha-A-Nova | 2021/07/16 10:00 | Simon Carr v Anton Matusevich | 4-6,6-4,4-6 |
| ITF M25 Idanha-A-Nova | 2021/07/15 10:45 | Simon Carr v Alejandro Moro Canas | 4-6,6-3,6-4 |