Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| 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 Prague | 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 Lodz | 2023/08/09 17:15 | Szymon Kielan v Patrick Kaukovalta | 6-7,4-6 |
| ITF M15 Monastir | 2023/10/11 08:00 | Maxence Rivet v Adrian Oetzbach | 4-6,7-5,6-2 |
| ITF M15 Forbach | 2023/09/28 09:00 | Hamish Stewart v Adrian Oetzbach | 6-3,7-5 |
| ITF M15 Forbach | 2023/09/26 07:00 | Arthur Nagel v Adrian Oetzbach | 1-6,1-6 |
| ITF M15 Danderyd | 2023/09/22 08:00 | Adrian Oetzbach v Mats Rosenkranz | 3-6,2-6 |
| ITF M15 Danderyd | 2023/09/21 09:50 | Adrian Oetzbach v Milos Karol | 6-4,6-4 |
| ITF M15 Danderyd | 2023/09/20 12:45 | Adrian Oetzbach v Henrik Bladelius | 6-3,6-2 |
| ITF M15 Buschhausen | 2023/09/15 10:00 | Louis Wessels v Adrian Oetzbach | 7-6,6-7,6-3 |
| ITF M15 Buschhausen | 2023/09/14 10:00 | Fadi Bidan v Adrian Oetzbach | 1-6,3-6 |