Face à face
| Polish National Tour | 2020/07/08 13:00 | Zielinski, Jan v Kacper Zuk | 6-4,6-3 |
| Polish National Tour | 2020/06/23 08:00 | Kacper Zuk v Zielinski, Jan | 6-2,3-6,6-2 |
| Barnstaple, Singles Qualifying M-ITF-GBR-01A | 2020/02/13 11:20 | Kacper Zuk v Zielinski, Jan | 3-6,6-0,6-1 |
| ITF - M15 Sharm El Sheikh | 2019/10/30 11:25 | Zielinski, Jan v Kacper Zuk | 3-6,3-6 |
| Stockholm, Singles M-ITF-SWE-05A | 2019/09/27 10:00 | Kacper Zuk v Zielinski, Jan | 6-3,6-1 |
| Challenger Szczecin | 2019/09/09 12:15 | Kacper Zuk v Zielinski, Jan | 6-7,7-6,6-2 |
Home History
| Braunchsweig, Germany | 2022/07/06 10:40 | Marco Cecchinato v Kacper Zuk | 6-1,4-6,6-2 |
| Braunchsweig, Germany | 2022/07/05 13:10 | Gastao Elias v Kacper Zuk | 6-7,3-6 |
| Braunchsweig, Germany | 2022/07/04 10:50 | Kacper Zuk v Alexey Vatutin | 7-6,6-1 |
| Braunchsweig, Germany | 2022/07/03 12:25 | Kacper Zuk v Florig, Philip | 7-5,7-5 |
| Challenger Troyes | 2022/06/28 08:30 | Kacper Zuk v Thiago Agustin Tirante | 5-7,1-6 |
| Wimbledon, London, Great Britain | 2022/06/20 11:40 | Marc-Andrea Huesler v Kacper Zuk | 6-3,7-6 |
| Troisdorf, Germany | 2022/05/24 13:10 | Kacper Zuk v Fabbiano, Thomas | 3-6,2-6 |
| Open de France | 2022/05/17 10:50 | Stebe, Cedrik-Marcel v Kacper Zuk | 3-6,6-1,6-4 |
Away History
| Coupe Davis | 2022/03/05 13:20 | Gastao Elias v Zielinski, Jan | 6-1,6-3 |
| ATP Cup, Playoffs | 2022/01/07 06:30 | Pablo Carreno Busta v Zielinski, Jan | 6-2,6-1 |
| Mouilleron-Le-Captif, France | 2021/10/04 10:30 | Zizou Bergs v Zielinski, Jan | 6-1,6-3 |
| Mouilleron-Le-Captif, France | 2021/10/03 10:00 | Zielinski, Jan v Aidan Mchugh | 6-3,6-4 |
| Challenger Mallorca | 2021/09/02 15:40 | Yasutaka Uchiyama v Zielinski, Jan | 6-1,6-2 |
| Challenger Mallorca | 2021/09/01 15:05 | Gonzalez, Alejandro v Zielinski, Jan | 7-6,6-7,4-6 |
| Challenger Mallorca | 2021/08/31 08:00 | Zielinski, Jan v Gonzalez, Alejandro | 1-6,2-6 |
| Challenger Mallorca | 2021/08/30 08:00 | Mukund Sasikumar v Zielinski, Jan | 5-7,2-6 |