Stadium: Court 8 Round: 25 Ground: Clay
| ITF M15 Monastir | 2023/04/19 11:10 | Shunsuke Nakagawa v Szymon Kielan | 6-4,6-1 |
| ITF M15 Monastir | 2023/04/13 08:30 | Szymon Kielan v Daniel Rodrigues | 2-6,2-6 |
| ITF M15 Monastir | 2023/04/12 08:30 | Szymon Kielan v David Perez Sanz | 7-6,6-3 |
| ITF M25 Trnava | 2023/03/28 13:25 | Szymon Kielan v Hynek Barton | 6-4,2-6,4-6 |
| ITF M15 Monastir | 2023/03/17 11:00 | Olaf Pieczkowski v Szymon Kielan | 6-1,6-1 |
| ITF M15 Monastir | 2023/03/16 12:40 | Lorenzo Carboni v Szymon Kielan | 6-7,6-1,4-6 |
| ITF M15 Monastir | 2023/03/14 12:40 | Josh Roe Flannelly v Szymon Kielan | 2-6,3-6 |
| ITF M15 Monastir | 2023/03/09 11:30 | Szymon Kielan v Lorenzo Carboni | 3-6,3-6 |
| ITF M15 Doboj | 2023/05/13 07:30 | Ergi Kirkin v Stefan Popovic | 2-6,6-3,6-4 |
| ITF M15 Doboj | 2023/05/12 08:35 | Lautaro Agustin Falabella v Stefan Popovic | 6-3,0-6,0-6 |
| ITF M15 Doboj | 2023/05/10 15:20 | Radomir Tomic v Stefan Popovic | 3-6,2-6 |
| ITF M15 Kursumlijska Banja | 2023/05/04 09:05 | Stefan Popovic v Oleksandr Ovcharenko | 5-7,0-6 |
| ITF M15 Kursumlijska Banja | 2023/05/03 08:00 | Stefan Popovic v Simone Agostini | 3-6,6-3,6-0 |
| ITF M15 Kursumlijska Banja | 2023/04/26 11:10 | Stefan Popovic v Lucas Bouquet | 4-6,3-6 |
| UTR Pro Beograd | 2023/04/17 08:08 | Nazim Makhlouf v Stefan Popovic | 3-6,1-6 |
| UTR Pro Beograd | 2023/04/16 08:00 | Viktor Jovic v Stefan Popovic | 3-6,2-6 |