Stadium: Court 3 Round: 44 Ground: Clay
| ITF M25 Esch/Alzette Qual | 2023/07/16 09:25 | Mats Bredschneijder v Roman Ruenger | 6-2,6-3 |
| ITF M25 Most | 2023/05/22 08:00 | Aleksandr Braynin v Roman Ruenger | 7-5,6-3 |
| ITF M15 Pazardzhik | 2023/05/15 11:30 | Mihai Razvan Marinescu v Roman Ruenger | 7-5,6-1 |
| ITF M15 Pazardzhik | 2023/05/15 07:00 | Roman Ruenger v Vardan Manukyan | 7-5,7-5 |
| ITF M15 Alaminos-Larnaca | 2023/04/24 07:00 | Shinnosuke Hiramatsu v Roman Ruenger | 6-2,6-0 |
| ITF M15 Alaminos-Larnaca | 2023/04/23 07:00 | Ioan A Teglas v Roman Ruenger | 4-6,6-4,6-10 |
| ITF M25 Palmanova | 2023/03/20 10:30 | Diego A B Sanchez v Roman Ruenger | 6-1,6-3 |
| ITF M25 Palmanova | 2023/03/18 13:00 | Roman Ruenger v Ghouse Ali Faisal | 6-3,7-6 |
| ITF M15 Bucharest | 2023/08/27 11:30 | Bogdan Pavel v Jeremy Gschwendtner | 6-2,6-2 |
| UTR Pro London | 2023/05/21 10:18 | Jeremy Gschwendtner v Kabeer Kapasi | 4-6,6-3,6-4 |
| UTR Pro London | 2023/05/20 07:00 | Jeremy Gschwendtner v Ed Pudney | 6-3,6-7,6-2 |
| UTR Pro London | 2023/05/19 07:00 | Oscar Weightman v Jeremy Gschwendtner | 6-2,5-4 |
| UTR Pro London | 2023/05/18 10:14 | Miguel Fernando Pereira v Jeremy Gschwendtner | 4-6,1-6 |
| UTR Pro London | 2023/05/16 07:00 | Richard Bloomfield v Jeremy Gschwendtner | 6-1,5-1 |
| UTR Pro London | 2023/05/15 10:30 | Jeremy Gschwendtner v Marcus Walters | 4-6,3-6 |
| ITF M25 Opatija | 2023/03/19 10:30 | Ivan Kremenchutskyi v Jeremy Gschwendtner | 1-6,6-3,10-8 |