Stadium: Centre Court Round: 25 Ground: Grass
| Open de France - Femmes | 2021/05/30 11:25 | Greet Minnen v Kvitova, Petra | 7-6,6-7,1-6 |
| WTA - Rome | 2021/05/12 09:30 | Vera Zvonareva v Kvitova, Petra | 6-4,3-6,6-4 |
| WTA - Rome | 2021/05/10 09:35 | Magda Linette v Kvitova, Petra | 6-1,0-6,2-6 |
| WTA - Madrid | 2021/05/05 11:35 | Barty, Ashleigh v Kvitova, Petra | 6-1,3-6,6-3 |
| WTA - Madrid | 2021/05/03 11:50 | Kvitova, Petra v Veronika Kudermetova | 6-3,4-6,6-4 |
| WTA - Madrid | 2021/05/01 13:15 | Kvitova, Petra v Angelique Kerber | 6-4,7-5 |
| WTA - Stuttgart | 2021/04/23 15:00 | Elina Svitolina v Kvitova, Petra | 6-7,7-5,6-2 |
| WTA - Stuttgart | 2021/04/21 18:30 | Maria Sakkari v Kvitova, Petra | 3-6,6-3,3-6 |
| WTA Bad Homburg | 2021/06/20 09:00 | Piter, Katarzyna v Nastasja Schunk | 7-6,2-6,7-6 |
| WTA - Bogota | 2021/04/03 16:25 | Piter, Katarzyna v Marina Melnikova | 5-7,0-6 |
| WTA Guadalajara | 2021/03/06 23:20 | Govortsova, Olga v Piter, Katarzyna | 6-0,6-2 |
| WTA - Abu Dhabi | 2021/01/05 08:05 | Piter, Katarzyna v Jessica Pieri | 4-6,0-6 |
| ITF W80 Tyler | 2020/10/26 19:20 | Hibi, Mayo v Piter, Katarzyna | 6-4,6-7,10-5 |
| ITF W60 Saint Malo | 2020/09/08 09:45 | Piter, Katarzyna v Flavie Brugnone | 0-6,3-6 |
| Polish National Tour Women | 2020/08/24 09:30 | Piter, Katarzyna v Weronika Falkowska | 4-6,6-3,3-6 |
| Polish National Tour Women | 2020/08/23 17:20 | Piter, Katarzyna v Oczachowska, Julia | 6-0,6-0 |