Stadium: Hard Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF - Heraklion M15 | 2019/11/12 13:05 | Tom Kocevar-Desman v Jan Zielinski | 1-6,4-6 |
| ITF - Sharm El Sheikh M15 | 2019/10/30 11:25 | Jan Zielinski v Kacper Zuk | 3-6,3-6 |
| ITF - Sharm El Sheikh M15 | 2019/10/23 08:00 | Karim-Mohamed Maamoun v Jan Zielinski | 7-5,6-2 |
| ITF - Falun M25 | 2019/10/01 11:00 | Antoine Bellier v Jan Zielinski | 6-4,6-4 |
| ITF - Falun M25 | 2019/09/30 09:10 | Jan Zielinski v Jonathan Stenberg | 6-3,6-4 |
| ITF - Falun M25 | 2019/09/29 12:00 | Jan Zielinski v Jakob Arvidsson Ehn | 6-2,6-1 |
| ITF M25 Stockholm | 2019/09/27 10:00 | Kacper Zuk v Jan Zielinski | 6-3,6-1 |
| ITF M25 Stockholm | 2019/09/26 12:00 | Jan Zielinski v Kaichi Uchida | 6-3,6-4 |
| ITF - Heraklion M15 | 2019/11/13 08:00 | Vasil Kirkov v Petros Tsitsipas | 7-6,7-6 |
| ITF M25 Fayetteville | 2019/10/23 20:15 | Jacob Dunbar v Vasil Kirkov | 3-6,6-2,6-1 |
| ITF M25 Waco | 2019/10/16 20:10 | Vasil Kirkov v Ben Patael | 4-6,1-6 |
| ITF M25 Waco | 2019/10/15 19:25 | Eric Morris v Vasil Kirkov | 0-6,1-6 |
| ITF M25 Waco | 2019/10/14 17:00 | Alastair Gray v Vasil Kirkov | 4-6,4-6 |
| ITF M25 Waco | 2019/10/13 17:30 | Herbert Jody Maginley v Vasil Kirkov | 1-6,6-4,8-10 |
| ITF - Cancun M15 | 2019/08/27 14:10 | Vasil Kirkov v Hillel Rousseau | 6-3,6-4 |
| Challenger Lexington | 2019/07/31 17:50 | Vasil Kirkov v Akira Santillan | 4-6,3-6 |