| Challenger Tulln | 09/03 14:10 | 14 | Mirza Basic v Constantin Bittoun Kouzmine | 6-7,7-6,7-6 | |
| Challenger Augsburg | 08/20 08:00 | 14 | [172] Neil Oberleitner v Constantin Bittoun Kouzmine [271] | 6-2,6-4 | |
| ITF M25 Koksijde | 08/17 13:55 | 26 | Mariano Kestelboim v Constantin Bittoun Kouzmine | 6-4,6-2 | |
| ITF M25 Koksijde | 08/15 14:35 | 25 | Alen Moritz Hodzic v Constantin Bittoun Kouzmine | 4-6,6-4,1-6 | |
| Challenger Liberec | 08/02 08:00 | 25 | [223] Francisco Comesana v Constantin Bittoun Kouzmine [285] | 6-1,6-3 | |
| Challenger Liberec | 07/31 08:00 | 19 | Constantin Bittoun Kouzmine v Dominik Recek | 5-7,7-6,6-0 | |
| Challenger Liberec | 07/30 11:30 | 14 | Constantin Bittoun Kouzmine v Patrik Rikl | Retired | |
| Challenger Segovia | 07/24 10:30 | 19 | Constantin Bittoun Kouzmine v Miguel Damas | 3-6,7-5,6-7 | |
| Challenger Segovia | 07/23 09:35 | 14 | [499] Constantin Bittoun Kouzmine v Arjun Kadhe [123] | 6-3,4-6,6-3 | |
| Challenger Pozoblanco | 07/16 18:00 | 14 | Miguel Damas v Constantin Bittoun Kouzmine | 6-0,6-1 | |
| Challenger Braunschweig | 07/11 16:20 | 25 | [138] Timofey Skatov v Constantin B Kouzmine [327] | 6-3,6-1 | |
| Challenger Braunschweig | 07/10 09:00 | 19 | Lewie Lane v Constantin B Kouzmine | 6-7,6-4,5-7 | |
| Challenger Braunschweig | 07/09 11:00 | 14 | [449] Arthur Reymond v Constantin B Kouzmine [327] | 2-6,3-6 | |
| Challenger Troyes | 07/02 12:45 | 14 | [328] Constantin B Kouzmine v David Jorda Sanchis [433] | 6-7,4-6 | |
| ITF M25 Mungia | 06/21 10:30 | 26 | Constantin B Kouzmine v Pedro Vives Marcos | 1-6,6-7 | |
| ITF M25 Mungia | 06/19 14:25 | 25 | Constantin B Kouzmine v Carlos Divar | 6-2,7-6 | |
| ITF M15 Duffel | 06/15 17:40 | 26 | Tim Handel v Constantin B Kouzmine | 6-2,7-5 | |
| ITF M15 Duffel | 06/14 11:00 | 25 | [444] Joao Victor C Loureiro v Constantin B Kouzmine [332] | 3-6,2-6 | |
| ITF M15 Tanger | 06/10 12:05 | 28 | Filippo Moroni v Constantin B Kouzmine | Retired | |
| ITF M15 Tanger | 06/09 11:10 | 27 | Yassine Dlimi v Constantin B Kouzmine | 3-6,7-6,4-6 | |
| ITF M15 Tanger | 06/08 11:00 | 26 | Kai Lemstra v Constantin B Kouzmine | 3-6,3-6 | |
| ITF M15 Tanger | 06/07 09:00 | 25 | Stefano Reitano v Constantin B Kouzmine | 6-7,2-6 | |
| Challenger Troisdorf | 05/30 11:20 | 25 | [263] Hernan Casanova v Constantin B Kouzmine [338] | 6-2,6-4 | |
| Challenger Troisdorf | 05/29 08:30 | 19 | [304] Oriol Roca Batalla v Constantin B Kouzmine [338] | 7-5,6-3 | |
| Challenger Troisdorf | 05/28 10:00 | 14 | Constantin B Kouzmine v Aldin Setkic | 6-7,6-4,6-4 | |
| Challenger Troisdorf | 05/28 09:50 | 14 | Constantin B Kouzmine v Lucas Gerch | Cancelled | |
| ITF M25 Angers | 04/20 12:05 | 26 | Constantin B Kouzmine v Lilian Marmousez | 6-3,1-6,4-6 | |
| ITF M25 Angers | 04/19 11:50 | 25 | Constantin B Kouzmine v Loann Massard | 6-1,6-3 | |
| ITF M15 Monastir | 04/06 08:30 | 26 | Daniil Ostapenkov v Constantin B Kouzmine | 7-6,4-6,6-3 | |
| ITF M15 Monastir | 04/05 08:30 | 25 | Alexis Boureau v Constantin B Kouzmine | 2-6,2-6 |