Stadium: Court 5 Round: 26 Ground: Clay
| Challenger Sopot Qual | 2018/07/28 12:05 | Wojcik, Yann v Zielinski, Jan | 2-6,6-2,3-6 |
| Bydgoszcz, Singles Qualifying M-ITF-POL-04A | 2019/08/13 12:00 | Smola, Maciej v Zielinski, Jan | 3-6,4-6 |
| ITF M15 Wroclaw | 2019/07/03 15:45 | Petr Nouza v Zielinski, Jan | 6-1,7-6 |
| ITF M25 Pardubice | 2019/06/25 09:45 | Zielinski, Jan v Georgii Kravchenko | 2-6,1-6 |
| ITF M25 Pardubice | 2019/06/24 11:00 | Marek Gengel v Zielinski, Jan | 7-5,5-7,9-11 |
| ITF USA F29 | 2018/11/01 20:00 | Zielinski, Jan v Inoue, Haru | 5-7,5-7 |
| ITF USA F29 | 2018/10/30 16:35 | Green, Cameron v Zielinski, Jan | 4-6,3-6 |
| ITF Poland F6 | 2018/08/11 10:00 | Zielinski, Jan v Maciej Rajski | 5-7,1-6 |
| ITF Poland F6 | 2018/08/10 10:00 | Pawel Juszczak v Zielinski, Jan | 6-2,6-7,1-6 |
| Bydgoszcz, Singles Qualifying M-ITF-POL-04A | 2019/08/13 08:00 | Wojcik, Yann v Zielinski, Przemyslaw | 4-6,6-4,10-8 |
| Bydgoszcz, Singles Qualifying M-ITF-POL-04A | 2019/08/12 08:00 | Wojcik, Yann v Galka, Jan | 6-2,6-0 |
| Koszalin, Singles Qualifying M-ITF-POL-02A | 2019/08/07 09:15 | Wojcik, Yann v David Poljak | 6-7,4-6 |
| ITF M15 Wroclaw | 2019/07/04 10:05 | Alexander Shevchenko v Wojcik, Yann | 5-7,6-4,6-1 |
| ITF M15 Wroclaw | 2019/07/03 11:10 | Juliusz Bienkiewicz v Wojcik, Yann | 3-6,4-6 |
| ITF M15 Wroclaw | 2019/07/01 08:00 | Murphy, Brandon v Wojcik, Yann | 6-7,5-7 |
| ITF - M15 Sharm El Sheikh | 2019/04/10 08:00 | Wojcik, Yann v Jakub Paul | 3-6,3-6 |
| ITF - M15 Sharm El Sheikh | 2019/04/03 10:40 | Wojcik, Yann v Crepaldi, Erik | 2-6,2-6 |