Stadium: Court 5 Round: 26 Ground: Clay
| ITF M15 Haren | 2023/09/06 11:00 | Svyatoslav Gulin v Pepijn Bastiaansen | 7-5,6-4 |
| ITF M25 Santander | 2023/08/26 11:20 | Vilius Gaubas v Svyatoslav Gulin | 7-6,4-6,4-6 |
| ITF M25 Santander | 2023/08/25 09:30 | Svyatoslav Gulin v Benjamin Winter Lopez | 7-5,6-0 |
| ITF M25 Santander | 2023/08/24 13:30 | Ryan Nijboer v Svyatoslav Gulin | 6-3,6-7,3-6 |
| ITF M25 Santander | 2023/08/23 12:20 | Svyatoslav Gulin v Fnu Nidunjianzan | 6-4,3-6,6-0 |
| ITF M25 Santander | 2023/08/22 07:55 | Alejo Sanchez Quilez v Svyatoslav Gulin | 6-1,2-6,4-6 |
| ITF M15 Kottingbrunn | 2023/08/17 08:00 | Svyatoslav Gulin v Joel Schwaerzler | 1-6,1-6 |
| ITF M15 Kottingbrunn | 2023/08/15 08:00 | Sebastian Prechtel v Svyatoslav Gulin | 3-6,6-7 |
| ITF M15 Haren | 2023/09/06 11:30 | Kai Lemstra v Mika Lipp | 6-3,6-4 |
| ITF M15 Allershausen | 2023/09/02 12:00 | Adrian Oetzbach v Kai Lemstra | 6-4,6-3 |
| ITF M15 Allershausen | 2023/09/01 15:25 | Kai Lemstra v Daniel De Jonge | 7-5,6-1 |
| ITF M15 Allershausen | 2023/08/31 12:15 | Kai Lemstra v Taym Alazmeh | 6-2,6-2 |
| ITF M15 Allershausen | 2023/08/30 10:00 | Luca Wiedenmann v Kai Lemstra | 3-6,1-6 |
| ITF M15 Trier | 2023/08/24 10:30 | Max Wiskandt v Kai Lemstra | 6-4,6-4 |
| ITF M15 Trier | 2023/08/22 11:00 | Kai Lemstra v Adrian Oetzbach | 7-6,6-3 |
| ITF M15 Frankfurt Am Main | 2023/08/10 10:55 | Kai Lemstra v Johannes Haerteis | 7-5,4-6,2-6 |