Stadium: Court 3 Round: 25 Ground: Clay
| Orlando, Singles Qualifying W-WITF-USA-02A | 2017/01/19 23:00 | Polina Leykina v Piter, Katarzyna | 1-6,2-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/31 08:00 | Cuk, Pia v Polina Leykina | 7-6,3-6,7-5 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/28 10:00 | Polina Leykina v Kaja Juvan | 6-3,1-6,2-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/27 11:00 | Polina Leykina v Ylena In-Albon | 6-1,6-4 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/26 12:00 | Polina Leykina v Nina Potocnik | 7-6,3-6,6-1 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/25 12:00 | Polina Leykina v Veronika Erjavec | 7-5,6-4 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/24 12:00 | Ivakhnenko, Valentyna v Polina Leykina | 6-3,5-7,2-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/09/26 12:00 | Polina Leykina v Samsonova, Liudmila | 3-6,3-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/09/18 13:50 | Paula Badosa v Polina Leykina | 6-3,6-2 |
| ITF Women Petange | 2018/10/31 16:00 | Minella, Mandy v Piter, Katarzyna | 3-6,6-3,6-4 |
| ITF Women Petange | 2018/10/30 13:00 | Detiuc, Anastasia v Piter, Katarzyna | 2-6,2-6 |
| ITF Women Oslo | 2018/10/25 08:00 | Paula Badosa v Piter, Katarzyna | 6-3,6-3 |
| ITF Women Oslo | 2018/10/24 08:00 | Lister, Cornelia v Piter, Katarzyna | 7-5,3-6,2-6 |
| ITF Women Oslo | 2018/10/23 08:00 | Gerlach, Katharina v Piter, Katarzyna | 4-6,2-6 |
| WTA Luxembourg | 2018/10/13 21:10 | Piter, Katarzyna v Arantxa Rus | 1-6,3-6 |
| ITF Women Cherbourg | 2018/10/10 09:00 | Piter, Katarzyna v Cagla Buyukakcay | 7-5,3-6,5-7 |
| ITF Women Cherbourg | 2018/10/09 07:30 | Piter, Katarzyna v Fayol, Clemence | 6-4,6-2 |