Stadium: Court 4 Round: 27 Ground: Clay
| ITF - M25 Santander | 2023/08/23 17:00 | Ryan Nijboer v Sergio Callejon Hernando | 6-1,7-6 |
| ITF - M25 Santander | 2023/08/22 11:10 | Ryan Nijboer v Mikel Martinez | 6-1,6-2 |
| ITF - M15 Xativa | 2023/08/05 15:00 | Carlos Lopez Montagud v Ryan Nijboer | 6-1,6-1 |
| ITF - M15 Xativa | 2023/08/04 16:25 | Ryan Nijboer v Sergio Callejon Hernando | 6-2,6-3 |
| ITF - M15 Xativa | 2023/08/03 16:30 | Ryan Nijboer v Alejandro T Alvarez | 6-1,6-3 |
| ITF - M15 Xativa | 2023/08/01 15:30 | Ryan Nijboer v Toprak Avcibasi | 7-6,6-7,6-4 |
| ITF - M25 Denia | 2023/07/26 16:25 | Sergi Perez Contri v Ryan Nijboer | 6-4,6-3 |
| Challenger - Amersfoort | 2023/07/17 10:55 | Niels Visker v Ryan Nijboer | 7-6,3-6,7-5 |
| 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 Uslar | 2023/07/18 10:00 | Sebastian Prechtel v Svyatoslav Gulin | 6-1,6-3 |
| ITF - M25 Kassel | 2023/07/14 14:10 | Svyatoslav Gulin v Andrew Paulson | 2-6,2-6 |
| ITF - M25 Kassel | 2023/07/13 11:00 | Aleksandre Metreveli v Svyatoslav Gulin | 1-6,3-6 |
| ITF - M25 Kassel | 2023/07/12 12:15 | Svyatoslav Gulin v Max Wiskandt | 6-4,6-4 |