Stadium: Court 3 Round: 44 Ground: Clay
| ITF M25 Telavi | 2023/10/15 06:00 | Roman Ruenger v Savelii Shpita | 6-7,6-1,10-2 |
| ITF M25 Esch/Alzette - kval | 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 Telavi | 2023/10/11 07:55 | Christopher Bulus v Jeremy Gschwendtner | 6-2,2-6,6-3 |
| ITF M25 Telavi | 2023/10/10 06:00 | Jeremy Gschwendtner v Dennis Dragomirov | 6-2,6-4 |
| ITF M15 Constanta | 2023/09/07 07:00 | Lautaro Agustin Falabella v Jeremy Gschwendtner | 6-2,7-6 |
| ITF M15 Constanta | 2023/09/06 10:40 | Jeremy Gschwendtner v Vlad Andrei Dumitru | 6-4,6-4 |
| ITF M15 Constanta | 2023/09/05 07:00 | Alan Postay v Jeremy Gschwendtner | 1-6,1-6 |
| ITF M15 Constanta | 2023/09/04 07:00 | Carl Holder v Jeremy Gschwendtner | 5-7,1-6 |
| ITF M15 Constanta | 2023/09/03 06:00 | Jeremy Gschwendtner v Adrian Mateo Bejenaru | 7-5,6-0 |
| ITF M15 Bukarest | 2023/08/27 11:30 | Bogdan Pavel v Jeremy Gschwendtner | 6-2,6-2 |