| Polish National Tour Women | 2020/07/17 09:30 | Katarzyna Piter v Joanna Zawadzka | 3-6,6-4,7-5 |
| Polish National Tour Women | 2020/07/28 09:00 | Katarzyna Piter v Anastasiya Shoshyna | 0-6,6-4,3-6 |
| Polish National Tour Women | 2020/07/27 09:30 | Katarzyna Piter v Stefania Rogozinska-Dzik | 6-2,6-3 |
| Polish National Tour Women | 2020/07/26 14:05 | Katarzyna Piter v Marcelina Podlinska | 7-5,6-2 |
| Polish National Tour Women | 2020/07/25 15:45 | Katarzyna Piter v Witoria Rutkowska | 6-2,6-2 |
| Polish National Tour Women | 2020/07/18 08:00 | Katarzyna Kawa v Katarzyna Piter | 7-6,6-0 |
| Polish National Tour Women | 2020/07/17 09:30 | Katarzyna Piter v Joanna Zawadzka | 3-6,6-4,7-5 |
| Polish National Tour Women | 2020/07/15 14:35 | Katarzyna Piter v Aleksandra Wierzbowska | 6-2,6-0 |
| Eastern European Championship Women | 2020/07/10 12:50 | Katarzyna Piter v Mihaela Djakovic | 6-2,5-7,6-2 |
| Polish National Tour Women | 2020/07/29 11:00 | Zuzanna Krygier v Joanna Zawadzka | 1-6,0-6 |
| Polish National Tour Women | 2020/07/25 12:35 | Marcelina Podlinska v Joanna Zawadzka | 0-6,6-2,6-3 |
| Polish National Tour Women | 2020/07/24 16:45 | Katarzyna Wysoczanska v Joanna Zawadzka | 5-7,1-6 |
| Polish National Tour Women | 2020/07/17 09:30 | Katarzyna Piter v Joanna Zawadzka | 3-6,6-4,7-5 |
| Polish National Tour Women | 2020/06/23 10:00 | Joanna Zawadzka v Anastasiya Shoshyna | 1-6,6-2,3-6 |
| Polish National Tour Women | 2020/06/22 12:20 | Joanna Zawadzka v Paula Kania-Chodun | 6-3,6-3 |
| ITF W15 Monastir | 2020/03/05 08:30 | Nefisa Berberovic v Joanna Zawadzka | 6-1,6-1 |
| ITF W15 Monastir | 2020/03/03 08:30 | Sina Herrmann v Joanna Zawadzka | 3-6,5-7 |