| 29.08.20 | Finală | Jan Zielinski/Kacper Zuk | Mikolaj Lorens/Wojciech Marek | 7-5, 6-2 |  | detaliu meci | M25 Poznan | Zgura |
| 28.08.20 | Semifinală | Jan Zielinski/Kacper Zuk | Michal Dembek/Yann Wojcik | 7-5, 6-3 |  | detaliu meci |
| 27.08.20 | Sfert de finală | Jan Zielinski/Kacper Zuk | Piotr Matuszewski/Martins Podzus | 6-1, 6-3 |  | detaliu meci |
| 26.08.20 | 1-a rundă | Jan Zielinski/Kacper Zuk | Gijs Brouwer/Jelle Sels | 6-2, 3-6, 10-6 |  | detaliu meci |
| 15.02.20 | Finală | Jan Zielinski/Kacper Zuk | Evan Hoyt/Luke Johnson | 6-3, 7-65 |  | detaliu meci | M25 Barnstaple | In. Hard |
| 14.02.20 | Semifinală | Jan Zielinski/Kacper Zuk | Kai Lemstra/Wojciech Marek | 6-0, 6-1 |  | detaliu meci |
| 12.02.20 | Sfert de finală | Jan Zielinski/Kacper Zuk | Anton Matusevich/Morgan Phillips | Anton Matusevich/Morgan Phillips - nu s-a prezentat |  | detaliu meci |
| 11.02.20 | 1-a rundă | Jan Zielinski/Kacper Zuk | George Davies/Adam Jones | 6-2, 6-2 |  | detaliu meci |
| 25.01.20 | Finală | Jan Zielinski/Kacper Zuk | Johannes Haerteis/Peter Heller | 6-3, 6-4 |  | detaliu meci | M25 Nussloch | Carpet |
| 23.01.20 | Sfert de finală | Jan Zielinski/Kacper Zuk | Mats Hermans/Bart Stevens | 6-4, 7-5 |  | detaliu meci |
| 23.01.20 | Semifinală | Jan Zielinski/Kacper Zuk | Ryan Nijboer/Glenn Smits | 6-4, 7-63 |  | detaliu meci |
| 21.01.20 | 1-a rundă | Jan Zielinski/Kacper Zuk | Jan Satral/Robin Stanek | 2-6, 6-2, 10-7 |  | detaliu meci |
| 25.11.19 | Semifinală | Jose Joaquin Miranda Cisneros/David Vega Hernandez | Jan Zielinski/Kacper Zuk | 6-3, 1-0, Jan Zielinski/Kacper Zuk - retragere |  | detaliu meci | M15 Telde | Zgura |
| 25.11.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | Luis Diego Chavez Villalpando/Miguel Damas | 6-0, 7-5 |  | detaliu meci |
| 25.11.19 | Sfert de finală | Jan Zielinski/Kacper Zuk | Joan B Borras Isern/Alvaro Saez-Royuela Ariza | 6-2, 6-2 |  | detaliu meci |
| 28.10.19 | Finală | Jan Zielinski/Kacper Zuk | Pablo Vivero Gonzalez/Ching-Mou Yu | 6-3, 6-1 |  | detaliu meci | M15 Sharm | Hard |
| 28.10.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | Hanyi Liu/Chukang Wang | 6-4, 6-1 |  | detaliu meci |
| 28.10.19 | Sfert de finală | Jan Zielinski/Kacper Zuk | Julian Cash/Piotr Matuszewski | 6-1, 6-2 |  | detaliu meci |
| 28.10.19 | Semifinală | Jan Zielinski/Kacper Zuk | Aryan Goveas/Courtney John Lock | 6-1, 6-2 |  | detaliu meci |
| 23.09.19 | Finală | Filip Bergevi/Florian Lakat | Jan Zielinski/Kacper Zuk | 6-3, 7-63 |  | detaliu meci | M25 Stockholm | In. Hard |
| 23.09.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | Piotr Matuszewski/Naoki Tajima | 6-2, 6-4 |  | detaliu meci |
| 23.09.19 | Sfert de finală | Jan Zielinski/Kacper Zuk | Antoine Bellier/Glenn Smits | 6-4, 6-1 |  | detaliu meci |
| 23.09.19 | Semifinală | Jan Zielinski/Kacper Zuk | Janis Podzus/Martins Podzus | 6-4, 7-64 |  | detaliu meci |
| 16.09.19 | Sfert de finală | Jan Zielinski/Kacper Zuk | Sarp Agabigun/Mert Alkaya | 6-1, 6-2 |  | detaliu meci | M15 Antalya | Zgura |
| 16.09.19 | Semifinală | Jan Zielinski/Kacper Zuk | Luca Gelhardt/Kai Wehnelt | 6-4, 6-2 |  | detaliu meci |
| 16.09.19 | Finală | Jan Zielinski/Kacper Zuk | Adil Kalyanpur/Kelsey Stevenson | 3-6, 6-1, 10-8 |  | detaliu meci |
| 16.09.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | Tomas Liska/Samuel Puskar | 6-2, 6-1 |  | detaliu meci |
| 12.09.19 | Sfert de finală | Matwe Middelkoop/Hans Podlipnik-Castillo | Jan Zielinski/Kacper Zuk | 6-4, 7-5 |  | detaliu meci | Szczecin Challenger | Zgura |
| 11.09.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | Ivan Gakhov/Vit Kopriva | 7-68, 6-2 |  | detaliu meci |
| 12.08.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | Aron Stajszczak/Mikolaj Szmyrgala | 6-2, 6-2 |  | detaliu meci | M25+H Bydgoszcz | Zgura |
| 12.08.19 | Sfert de finală | Vladyslav Manafov/David Pichler | Jan Zielinski/Kacper Zuk | 6-3, 3-6, 10-8 |  | detaliu meci |
| 30.07.19 | 1-a rundă | Tomislav Brkic/Ante Pavic | Jan Zielinski/Kacper Zuk | 4-6, 6-1, 10-8 |  | detaliu meci | Sopot Challenger | Zgura |
| 23.07.19 | 1-a rundă | Tomislav Draganja/Nikola Milojevic | Jan Zielinski/Kacper Zuk | 3-6, 6-3, 10-7 |  | detaliu meci | Prague Challenger | Zgura |
| 01.07.19 | Finală | Jan Zielinski/Kacper Zuk | Jan Galka/Piotr Galus | 6-4, 6-3 |  | detaliu meci | M15 Wroclaw | Zgura |
| 01.07.19 | 1-a rundă | Jan Zielinski/Kacper Zuk | David Poljak/Robin Stanek | 6-4, 5-7, 10-2 |  | detaliu meci |
| 01.07.19 | Sfert de finală | Jan Zielinski/Kacper Zuk | Michal Mikula/Yann Wojcik | 6-2, 6-3 |  | detaliu meci |
| 01.07.19 | Semifinală | Jan Zielinski/Kacper Zuk | Petr Nouza/Michael Vrbensky | 7-63, 6-3 |  | detaliu meci |
| 06.08.18 | Sfert de finală | Jan Zielinski/Kacper Zuk | Tomasz Bednarek/Karol Drzewiecki | 6-4, 6-1 |  | detaliu meci | Poland F6 | Zgura |
| 06.08.18 | Semifinală | Jan Zielinski/Kacper Zuk | Kamil Gajewski/Szymon Walkow | 6-2, 1-6, 10-5 |  | detaliu meci |
| 06.08.18 | Finală | Jan Zielinski/Kacper Zuk | Pawel Juszczak/Michal Dembek | 6-2, 6-2 |  | detaliu meci |
| 06.08.18 | 1-a rundă | Jan Zielinski/Kacper Zuk | Piotr Galus/Mikolaj Szmyrgala | 6-2, 4-6, 10-6 |  | detaliu meci |