Estádio: Court 1 Round: 26 Ground: Clay
| 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 |
| ITF - M15 Kamen | 2023/07/02 08:55 | Svyatoslav Gulin v Hynek Barton | 2-6,6-4,6-2 |
| ITF - M15 Kamen | 2023/07/01 10:00 | Svyatoslav Gulin v Niels Visker | 5-7,6-4,6-1 |
| ITF - M15 Kamen | 2023/06/30 10:30 | Svyatoslav Gulin v Hazem Naw | 6-2,6-1 |
| ITF - M15 Kottingbrunn | 2023/08/16 09:50 | Joel Schwaerzler v Marco Miceli | 6-7,6-0,6-2 |
| ITF - M15 Frankfurt am Main | 2023/08/09 12:00 | Joel Schwaerzler v Michael Agwi | 6-7,2-6 |
| ATP - Kitzbuhel | 2023/07/29 09:00 | Joel Schwaerzler v Dennis Novak | 4-6,1-6 |
| Challenger - Mauthausen | 2023/05/07 09:45 | Illya Marchenko v Joel Schwaerzler | 7-5,6-2 |
| ITF - M15 Antália | 2023/03/18 07:00 | Andrey Chepelev v Joel Schwaerzler | 6-3,5-7,1-6 |
| ITF - M15 Antália | 2023/03/18 07:00 | Dragos Nicolae Madaras v Joel Schwaerzler | 7-5,6-2 |
| ITF - M15 Antália | 2023/03/16 12:25 | Joel Schwaerzler v Philip Florig | 6-3,6-1 |
| ITF - M15 Antália | 2023/03/15 09:30 | Joel Schwaerzler v Leopold Zima | 6-2,6-2 |