Stadium: Court 4 Round: 14 Ground: Hardcourt indoor
| Challenger Ismaning | 2023/10/31 11:05 | Adrian Andreev v Kacper Zuk | 6-7,4-6 |
| Challenger Brest | 2023/10/23 10:30 | Duje Ajdukovic v Adrian Andreev | 6-4,6-2 |
| Challenger Brest | 2023/10/22 12:20 | Adrian Andreev v Oleksii Krutykh | 7-6,7-6 |
| Challenger Malaga | 2023/10/10 12:50 | Albert Ramos-Vinolas v Adrian Andreev | 4-6,6-0,7-5 |
| Challenger Alicante | 2023/10/03 12:30 | Adrian Andreev v Elias Ymer | 6-4,1-6,4-6 |
| Challenger Bad Waltersdorf | 2023/09/20 09:35 | Adrian Andreev v Marvin Moeller | 5-7,4-6 |
| Challenger Szczecin | 2023/09/15 12:30 | Alexander Shevchenko v Adrian Andreev | 6-3,5-7,7-5 |
| Challenger Szczecin | 2023/09/13 11:00 | Adrian Andreev v Hugo Gaston | 2-6,7-5,6-4 |
| ITF M15 Selva Gardena | 2023/11/04 10:55 | Stefano Napolitano v Adrian Oetzbach | 7-5,6-4 |
| ITF M15 Selva Gardena | 2023/11/03 13:15 | Adrian Oetzbach v Giovanni Oradini | 6-4,3-6,7-6 |
| ITF M15 Selva Gardena | 2023/11/02 16:10 | Adrian Oetzbach v Lorenzo Rottoli | 6-3,6-1 |
| ITF M15 Selva Gardena | 2023/11/01 13:30 | Adrian Oetzbach v Daniel Bagnolini | 6-2,6-2 |
| ITF M15 Selva Gardena | 2023/10/31 08:30 | Adrian Oetzbach v Leopold Zima | 6-3,6-4 |
| ITF M15 Monastir | 2023/10/27 08:30 | Adrian Oetzbach v Alberto Barroso Campos | 3-6,2-6 |
| ITF M15 Monastir | 2023/10/26 08:30 | Adrian Oetzbach v Andrea Bacaloni | 7-6,4-6,6-1 |
| ITF M15 Monastir | 2023/10/24 10:15 | Adrian Oetzbach v Michael Gloeckler | 6-1,6-2 |