Stadium: Hard 17 Round: 25 Ground: Hardcourt outdoor
| UTR Pro Thessaloniki | 2023/04/29 08:00 | Andreas Loizas v Vladimir Filip | 6-4,2-6,2-6 |
| UTR Pro Thessaloniki | 2023/04/28 05:00 | Christos Keisidis v Andreas Loizas | 2-5 |
| UTR Pro Thessaloniki | 2023/04/27 06:30 | Ivan Kremenchutskyi v Andreas Loizas | 2-6,0-6 |
| UTR Pro Thessaloniki | 2023/04/26 09:40 | Vasile Antonescu v Andreas Loizas | 3-6,6-2,6-3 |
| UTR Pro Thessaloniki | 2023/04/24 05:00 | Samuel Kyjaci v Andreas Loizas | 6-4,6-7,3-6 |
| ITF M15 Danderyd | 2023/09/19 12:25 | Sebastian Eriksson v Szymon Kielan | 6-2,6-3 |
| Challenger - Szczecin | 2023/09/10 09:45 | Steven Diez v Szymon Kielan | 6-1,7-5 |
| ITF M15 Koszalin | 2023/09/07 13:25 | Patrick Zahraj v Szymon Kielan | 7-6,6-3 |
| ITF M15 Koszalin | 2023/09/06 12:00 | Alan Bojarski v Szymon Kielan | 7-6,2-6,5-7 |
| ITF M15 Szczawno | 2023/08/30 14:10 | Valerio Perruzza v Szymon Kielan | 6-1,6-1 |
| Challenger - Praha | 2023/08/20 09:40 | Michael Vrbensky v Szymon Kielan | 6-2,6-4 |
| Challenger Grodzisk Mazowiecki | 2023/08/13 13:20 | Szymon Kielan v Alex Knaff | 3-6,0-6 |
| ITF M25 Łódź | 2023/08/09 17:15 | Szymon Kielan v Patrick Kaukovalta | 6-7,4-6 |