Stadium: Court 5 Round: 54 Ground: Hardcourt indoor
| 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 |
| ITF M25 Pardubice | 2019/06/25 09:45 | Jan Zielinski v Georgii Kravchenko | 2-6,1-6 |
| ITF M25 Pardubice | 2019/06/24 11:00 | Marek Gengel v Jan Zielinski | 7-5,5-7,9-11 |
| ITF M15 Helsinki | 2019/08/21 11:50 | Jonathan Stenberg v Iiro Vasa | 6-4,3-6,4-6 |
| ITF M15 Helsinki | 2019/08/20 07:00 | Jonathan Stenberg v Leevi Saatela | 6-0,6-3 |
| ITF M15 Helsinki | 2019/08/19 13:00 | Jonathan Stenberg v Richard Solberg | 4-6,6-1,10-5 |
| ITF M15 Ystad | 2019/08/07 10:30 | Robin Thour v Jonathan Stenberg | 6-0,6-2 |
| ITF M15 Kalmar | 2019/05/13 10:10 | Jonathan Stenberg v Anton Ornberg | 3-6,3-6 |
| ITF M15 Karlskrona | 2019/05/07 10:55 | Jonathan Stenberg v John Harrison Richmond | 6-7,6-7 |
| ITF M15 Karlskrona | 2019/05/06 12:10 | Jonathan Stenberg v Melker Isaksson | 6-2,6-1 |
| ITF M15 Oslo | 2019/03/04 09:00 | Jonathan Stenberg v Simon Yitbarek | 0-6,5-7 |