Stadium: TVM Court (3) Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Antalya | 2021/04/14 10:30 | Ivan Sergeyev v Schmitz, Constantin | 6-3,5-7,6-3 |
| ITF - M15 Antalya | 2021/04/08 06:55 | Flavio Cobolli v Schmitz, Constantin | 7-6,7-6 |
| ITF - M15 Antalya | 2021/04/06 07:00 | Schmitz, Constantin v Bogdan Bobrov | 6-1,6-4 |
| ITF - M15 Antalya | 2021/03/30 08:30 | Pol Martin Tiffon v Schmitz, Constantin | 6-4,7-6 |
| ITF - M15 Antalya | 2021/03/26 07:00 | Georgii Kravchenko v Schmitz, Constantin | 6-2,6-3 |
| ITF - M15 Antalya | 2021/03/24 07:30 | Schmitz, Constantin v Pedro Vives Marcos | 6-3,6-3 |
| ITF - M15 Monastir | 2021/03/10 10:30 | Mertens, Yannick v Schmitz, Constantin | 6-0,6-2 |
| ITF - M15 Monastir | 2021/03/04 08:30 | Mateus Alves v Schmitz, Constantin | 6-3,6-4 |
| ITF M15 Troisdorf | 2021/05/11 08:00 | Kocevar-Desman, Tom v Yannik Steinegger | 6-3,6-1 |
| ITF M15 Troisdorf | 2021/05/10 09:30 | Kocevar-Desman, Tom v Hazem Naw | 6-3,6-4 |
| ITF M15 Troisdorf | 2021/05/09 08:00 | Kocevar-Desman, Tom v Kecojevic, Mihailo | 6-1,6-2 |
| ITF - M15 Monastir | 2021/04/06 09:00 | Kocevar-Desman, Tom v Sho Shimabukuro | 3-6,6-3,3-6 |
| ITF - M15 Monastir | 2021/03/29 09:00 | Kocevar-Desman, Tom v Hazem Naw | 4-6,1-6 |
| ITF - M15 Monastir | 2021/03/28 09:30 | Kocevar-Desman, Tom v Brun, Thomas George | 6-1,6-1 |
| ITF - M15 Monastir | 2021/02/18 10:35 | Erler, Alexander v Kocevar-Desman, Tom | 6-1,6-7,6-3 |
| ITF - M15 Monastir | 2021/02/17 08:00 | Kocevar-Desman, Tom v de La Bassetiere, Constant | 6-1,6-4 |