Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF W25 Radom - NP | 2021/08/10 14:00 | Hertel/Kubka v Alves/Shymanovich | 2-6,6-7 |
| ITF W25 Bydgoszcz - NP | 2021/08/04 16:55 | Hertel/Kubka v Jakupovic/Marcinkevica | 4-6,2-6 |
| ITF W60 Grodzisk Mazowiecki - NP | 2021/07/30 15:00 | Hertel/Kubka v Gatica/Pereira | 6-3,2-6,7-10 |
| ITF W60 Grodzisk Mazowiecki - NP | 2021/07/29 13:45 | Hertel/Kubka v Collins/Gamiz | 7-6,1-6,10-7 |
| ITF W60 Grodzisk Mazowiecki - NP | 2021/07/27 12:40 | Contreras Gomez/Sanchez v Hertel/Kubka | 5-7,1-6 |
| WTA Gdynia - NP | 2021/07/20 14:25 | Hertel/Kubka v Bara/Lepchenko | 6-7,6-7 |
| ITF W25 Wroclaw - NP | 2021/07/03 14:50 | Brancaccio/Oz v Hertel/Kubka | 7-6,3-6,7-10 |
| ITF W25 Wroclaw - NP | 2021/06/30 17:05 | Hertel/Kubka v Danilina/Strakhova | 6-3,6-2 |