| TT Star Series | 2023/08/09 10:45 | Frantisek Onderka v Boguslaw Koszyk | L | 0-3 |
| TT Star Series | 2023/08/09 08:15 | Elias Ranefur v Frantisek Onderka | L | 3-1 |
| TT Star Series | 2023/08/09 06:35 | Frantisek Onderka v Viktor Yefimov | L | 2-3 |
| TT Star Series | 2023/08/03 11:15 | Jiri Vrablik v Frantisek Onderka | L | 3-2 |
| TT Star Series | 2023/08/03 09:45 | Michal Obeslo v Frantisek Onderka | L | 3-1 |
| TT Star Series | 2023/08/03 07:45 | Oleksandr Tymofieiev v Frantisek Onderka | W | 1-3 |
| TT Star Series | 2023/08/02 13:15 | Khalid Assar v Frantisek Onderka | L | 3-0 |
| TT Star Series | 2023/08/02 10:45 | Ilias Michailidis v Frantisek Onderka | W | 0-3 |
| TT Star Series | 2023/08/09 10:15 | Elias Ranefur v David Serdaroglu | W | 2-3 |
| TT Star Series | 2023/08/09 08:45 | David Serdaroglu v Viktor Yefimov | L | 1-3 |
| TT Star Series | 2023/08/09 07:10 | David Serdaroglu v Michal Benes | W | 3-1 |
| WTT Feeder Havirov | 2023/07/28 10:25 | Tommaso Giovannetti v David Serdaroglu | L | 3-0 |
| WTT Star Contender Ljubljana Quals | 2023/07/03 17:35 | Ricardo Walther v David Serdaroglu | L | 3-0 |
| WTT Contender Zagreb Quals | 2023/06/26 18:00 | David Serdaroglu v Mizuki Oikawa | L | 0-3 |
| WTT Contender Zagreb Quals | 2023/06/26 10:00 | David Serdaroglu v Abdulaziz Bu Shulaybi | W | 3-2 |
| Others | 2023/06/04 20:44 | David Serdaroglu v Adrian Dillon | W | 3-0 |