Stadium: Hard 17 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2023/10/25 06:30 | Valentin Royer v Dax Donders | 6-3,6-4 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/19 13:15 | Aleksandr Braynin v Valentin Royer | 6-4,6-2 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/18 09:25 | Patrick Kaukovalta v Valentin Royer | 1-6,2-6 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/15 10:00 | Valentin Royer v Henrique Rocha | 4-6,4-6 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/14 13:15 | Valentin Royer v Eliakim Coulibaly | 6-3,6-2 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/13 13:35 | Valentin Royer v Tiago Pereira | 6-1,7-5 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/12 11:40 | Valentin Royer v Luke Simkiss | 6-2,6-3 |
| Tavira, Simples M-ITF-POR-14A | 2023/10/11 08:30 | Valentin Royer v Joao Domingues | 6-4,6-3 |
| ITF - M15 Héraklion | 2023/10/24 09:00 | Szymon Kielan v Kevin Edengren | 6-3,6-2 |
| ITF - M15 Héraklion | 2023/10/19 06:30 | Oliver Ojakaar v Szymon Kielan | 7-6,7-6 |
| ITF - M15 Héraklion | 2023/10/18 06:30 | Andreas Loizas v Szymon Kielan | 1-6,2-6 |
| 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 |
| Koszalin, Singles Qualifying M-ITF-POL-02A | 2023/09/07 13:25 | Patrick Zahraj v Szymon Kielan | 7-6,6-3 |
| Koszalin, Singles Qualifying M-ITF-POL-02A | 2023/09/06 12:00 | Bojarski, Alan 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 |