Stadium: Court 1 Round: 25 Ground: Clay
| Challenger Bad Waltersdorf | 2023/09/18 10:05 | Ergi Kirkin v Neil Oberleitner | 6-7,6-4,6-2 |
| Challenger Bad Waltersdorf | 2023/09/17 14:00 | Ergi Kirkin v Matthias Ujvary | 6-2,6-2 |
| Davis Cup | 2023/09/16 10:25 | Matyas Fuele v Ergi Kirkin | 7-6,6-2 |
| Challenger Istanbul | 2023/09/06 09:00 | Ergi Kirkin v Lukas Klein | 3-6,4-6 |
| Challenger Istanbul | 2023/09/04 13:35 | Marek Gengel v Ergi Kirkin | 1-6,2-6 |
| ITF M25 Tainan | 2023/08/26 01:55 | Ergi Kirkin v Matyas Fuele | 1-6,6-4,3-6 |
| ITF M25 Tainan | 2023/08/25 02:00 | Ergi Kirkin v Takuya Kumasaka | 6-2,6-2 |
| ITF M25 Tainan | 2023/08/24 02:00 | Ergi Kirkin v Tomohiro Masabayashi | 6-4,6-3 |
| Challenger Szczecin | 2023/09/14 11:00 | Flavio Cobolli v Lukas Neumayer | 6-3,1-6,7-6 |
| Challenger Szczecin | 2023/09/12 11:10 | Lukas Neumayer v Facundo Diaz Acosta | 5-7,6-4,6-2 |
| Challenger Tulln | 2023/09/05 08:00 | Lukas Neumayer v Vitaliy Sachko | 6-7,6-7 |
| Challenger Como | 2023/08/31 12:05 | Thiago Seyboth Wild v Lukas Neumayer | 6-3,6-4 |
| Challenger Como | 2023/08/29 11:40 | Nikolas Sanchez Izquierdo v Lukas Neumayer | 3-6,7-5,3-6 |
| Challenger Prague | 2023/08/22 13:45 | Lukas Neumayer v Gabriel Debru | 6-2,3-6,4-6 |
| Challenger Cordenons | 2023/08/13 16:00 | Lukas Neumayer v Matteo Gigante | 0-6,2-6 |
| Challenger Cordenons | 2023/08/12 17:25 | Lukas Neumayer v Riccardo Bonadio | 6-2,7-6 |