Ground: Hardcourt outdoor
| ITF M15 Bastad | 2025/08/20 08:15 | Constantin Bittoun Kouzmine v Andreja Petrovic | 1-6,4-6 |
| ITF M25 Brazzaville | 2025/08/06 09:00 | Constantin Bittoun Kouzmine v Digvijay Pratap Singh | 4-6,6-7 |
| ITF M25 Brazzaville | 2025/07/31 13:26 | Constantin Bittoun Kouzmine v Matas Vasiliauskas | 7-6,2-5 |
| ITF M25 Brazzaville | 2025/07/29 09:00 | Constantin Bittoun Kouzmine v Rishikrishna Ayyappan | 6-0,6-2 |
| ITF M25 Uriage | 2025/07/16 10:55 | Arthur Nagel v Constantin Bittoun Kouzmine | 6-3,6-2 |
| ITF M15 Kayseri | 2025/07/04 07:00 | Nicolas Tepmahc v Constantin Bittoun Kouzmine | 7-6,5-2 |
| ITF M15 Kayseri | 2025/07/03 08:30 | Constantin Bittoun Kouzmine v Martin Borisiouk | 6-2,6-4 |
| ITF M15 Kayseri | 2025/07/02 07:00 | Kaan Isik Kosaner v Constantin Bittoun Kouzmine | 2-6,3-6 |
| ITF M25 Uberlingen | 2025/08/21 08:00 | Max Houkes v Tom Sickenberger | 4-6,6-3,6-1 |
| ITF M25 Uberlingen | 2025/08/19 13:10 | Tom Sickenberger v Mikalai Haliak | 7-6,3-6,6-3 |
| ITF M25 Metzingen | 2025/07/23 11:00 | Tom Sickenberger v David Fix | 5-7,3-6 |
| ITF M15 Uslar | 2025/07/17 09:30 | Tom Sickenberger v Mika Lipp | 1-6,0-6 |
| ITF M15 Uslar | 2025/07/15 11:03 | Alen Mujakic v Tom Sickenberger | 6-4,3-6,1-5 |
| ITF M25 Kassel | 2025/07/08 08:30 | Andrey Chepelev v Tom Sickenberger | 6-3,6-3 |
| ITF M25 Marburg | 2025/07/01 12:30 | Sergey Fomin v Tom Sickenberger | 6-3,5-1 |
| ITF M15 Trier | 2024/08/20 12:45 | Tom Sickenberger v Liam Gavrielides | 3-6,1-6 |