Stadium: Court 1 Round: 64 Ground: Hardcourt outdoor
| ITF W80 - Tyler | 2020/10/26 19:20 | Mayo Hibi v Katarzyna Piter | 6-4,6-7,10-5 |
| ITF W60 - Saint Malo | 2020/09/08 09:45 | Katarzyna Piter v Flavie Brugnone | 0-6,3-6 |
| Polen - National Tour - Damer | 2020/08/24 09:30 | Katarzyna Piter v Weronika Falkowska | 4-6,6-3,3-6 |
| Polen - National Tour - Damer | 2020/08/23 17:20 | Katarzyna Piter v Julia Oczachowska | 6-0,6-0 |
| Polen - National Tour - Damer | 2020/08/23 09:30 | Katarzyna Piter v Alicja Formella | 6-2,6-1 |
| Polen - National Tour - Damer | 2020/08/18 09:00 | Katarzyna Piter v Martyna Kubka | 4-6,3-6 |
| Polen - National Tour - Damer | 2020/08/16 08:30 | Katarzyna Piter v Paula Kania-Chodun | 6-4,6-3 |
| Polen - National Tour - Damer | 2020/08/15 12:50 | Katarzyna Piter v Alicja Formella | 6-1,6-0 |
| ITF W25 - Porto | 2020/09/27 10:00 | Jessica Pieri v Ramu Ueda | 5-7,2-6 |
| WTA Rom | 2020/09/12 09:35 | Jessica Pieri v Aliona Bolsova Zadoinov | 1-6,1-6 |
| WTA Prag | 2020/09/02 08:00 | Leonie Kung v Jessica Pieri | 6-1,1-6,4-6 |
| WTA Prag | 2020/08/31 08:00 | Jessica Pieri v Dasha Lopatetskaya | 3-6,7-6,6-4 |
| WTA Prag | 2020/08/29 12:00 | Irene Burillo Escorihuela v Jessica Pieri | 4-6,5-7 |
| Italien - Umbrian Open - Damer | 2020/06/25 08:30 | Nicole Fossa Huergo v Jessica Pieri | 7-6,6-4 |
| ITF W25 - Grenoble | 2020/02/13 11:15 | Jessica Pieri v Amandine Hesse | 6-7,6-7 |
| ITF W25 - Trnava | 2020/02/05 10:10 | Jessica Pieri v Viktoria Morvayova | 2-6,5-7 |