Stadium: Tillman's Court Round: 54
| ITF Women Croissy-Beaubourg Qual | 2018/03/25 14:50 | Petra Krejsova v Katarzyna Piter | 2-6,7-6,5-7 |
| ITF Women Jablonec Nad Nisou | 2018/06/30 08:30 | Petra Krejsova v Magdalena Pantuckova | 4-6,3-6 |
| ITF Women Jablonec Nad Nisou | 2018/06/29 08:00 | Petra Krejsova v Johana Markova | 6-3,6-3 |
| ITF Women Jablonec Nad Nisou | 2018/06/28 08:00 | Petra Krejsova v Yulia Kulikova | 6-3,6-4 |
| ITF Women Jablonec Nad Nisou | 2018/06/26 10:15 | Petra Krejsova v Dagmar Dudlakova | 6-3,6-2 |
| ITF Women Klosters | 2018/06/18 08:00 | Greet Minnen v Petra Krejsova | 6-4,6-7,6-1 |
| WTA Prague Qual | 2018/04/28 09:30 | Petra Krejsova v Antonia Lottner | 4-6,3-6 |
| WTA Stuttgart Qual | 2018/04/21 11:45 | Petra Krejsova v Veronika Kudermetova | 2-6,3-6 |
| ITF Women Istanbul | 2018/04/10 10:50 | Sabina Sharipova v Petra Krejsova | 6-4,6-2 |
| ITF Women Torun | 2018/06/26 16:05 | Katarzyna Piter v Marina Melnikova | 6-4,5-7,3-6 |
| WTA Hertogenbosch Qual | 2018/06/10 09:00 | Valentini Grammatikopoulou v Katarzyna Piter | 6-4,6-4 |
| WTA Hertogenbosch Qual | 2018/06/09 09:50 | Katarzyna Piter v Barbara Haas | 6-3,6-4 |
| ITF Women Brescia | 2018/06/06 09:30 | Francesca Di Lorenzo v Katarzyna Piter | 7-5,6-1 |
| ITF Women Brescia Qual | 2018/06/05 08:30 | Katarzyna Piter v Carolina Alves | 6-3,6-1 |
| ITF Women Brescia Qual | 2018/06/04 10:20 | Katarzyna Piter v Gabriela Ce | 6-1,6-1 |
| ITF Women Brescia Qual | 2018/06/03 12:25 | Katarzyna Piter v Michele Alexandra Zmau | 6-1,6-4 |
| ITF Women Grado Qual | 2018/05/26 13:00 | Katarzyna Piter v Maria Camila Osorio | 4-6,2-6 |