Stadium: Clay 4 Round: 26 Ground: Clay
| ITF M15 Antalya | 2019/09/18 07:40 | Jan Zielinski v Alejandro H Franco | 6-3,7-6 |
| Challenger Szczecin | 2019/09/09 12:15 | Kacper Zuk v Jan Zielinski | 6-7,7-6,6-2 |
| ITF M25 Poznan | 2019/08/20 12:00 | Denis Yevseyev v Jan Zielinski | 7-6,6-0 |
| ITF M25 Bydgoszcz | 2019/08/17 13:20 | Daniel Michalski v Jan Zielinski | 6-3,6-4 |
| ITF M25 Bydgoszcz | 2019/08/16 13:30 | Mohamed Aziz Dougaz v Jan Zielinski | 3-6,3-6 |
| ITF M25 Bydgoszcz | 2019/08/15 08:00 | Jan Zielinski v Yann Wojcik | 6-3,6-4 |
| ITF M25 Bydgoszcz | 2019/08/13 12:00 | Maciej Smola v Jan Zielinski | 3-6,4-6 |
| ITF M15 Wroclaw | 2019/07/03 15:45 | Petr Nouza v Jan Zielinski | 6-1,7-6 |
| Challenger Istanbul | 2019/09/11 10:15 | Marsel Ilhan v Ramkumar Ramanathan | 2-6,2-6 |
| Challenger Istanbul | 2019/09/09 09:35 | Marsel Ilhan v Mert Naci Turker | 6-4,6-3 |
| ITF M15 Kiryat Shmona | 2019/08/30 07:00 | Marsel Ilhan v Aidan Mchugh | 3-6,4-6 |
| ITF M15 Kiryat Shmona | 2019/08/29 06:30 | Marsel Ilhan v Alexis Canter | 7-6,7-5 |
| ITF M15 Kiryat Shmona | 2019/08/28 06:00 | Marsel Ilhan v Shahar Elbaz | 6-4,6-3 |
| ITF M15 Kiryat Shmona | 2019/08/24 07:30 | Marat Deviatiarov v Marsel Ilhan | 5-7,6-4,6-3 |
| ITF M15 Kiryat Shmona | 2019/08/23 07:30 | Marsel Ilhan v Yasha Zemel | 7-5,6-2 |
| ITF M15 Kiryat Shmona | 2019/08/22 07:00 | Marsel Ilhan v Markus Schultz | 7-6,6-3 |