Stadium: Court 3 Round: 26
| ITF Women Horb | 2018/07/25 10:00 | Julia Middendorf v Carmen Schultheiss | 2-6,2-6 |
| ITF Women Aschaffenburg Qual | 2018/07/01 12:00 | Carmen Schultheiss v Anna Gabric | 2-6,7-6,2-6 |
| ITF Women Aschaffenburg Qual | 2018/07/01 08:00 | Isabella Bozicevic v Carmen Schultheiss | 2-6,1-6 |
| ITF Women Stuttgart Qual | 2018/06/25 09:00 | Carmen Schultheiss v Elizabeth Halbauer | 3-6,0-6 |
| ITF Women Kaltenkirchen | 2018/06/18 13:00 | Shaline-Doreen Pipa v Carmen Schultheiss | 7-5,6-1 |
| ITF Women Kaltenkirchen | 2018/06/17 08:30 | Carmen Schultheiss v Alice Violet | 6-2,6-2 |
| ITF Women Essen Qual | 2018/06/10 10:00 | Anna Gabric v Carmen Schultheiss | 6-2,5-7,6-1 |
| ITF Women Essen Qual | 2018/06/10 07:00 | Carmen Schultheiss v Radina Rakic | 6-1,6-1 |
| ITF Women Horb | 2018/07/25 10:00 | Katarzyna Piter v Valeriya Strakhova | 7-5,6-3 |
| WTA Gstaad Qual | 2018/07/14 12:45 | Martina Trevisan v Katarzyna Piter | 4-6,7-6,6-3 |
| ITF Women Versmold | 2018/07/12 12:00 | Bibiane Schoofs v Katarzyna Piter | 7-5,6-2 |
| ITF Women Versmold | 2018/07/12 07:30 | Katarzyna Piter v Chiara Scholl | 6-3,6-1 |
| ITF Women Versmold Qual | 2018/07/10 11:00 | Miriam Kolodziejova v Katarzyna Piter | 6-7,4-6 |
| ITF Women Versmold Qual | 2018/07/09 11:00 | Aymet Uzcategui v Katarzyna Piter | 4-6,2-6 |
| ITF Women Versmold Qual | 2018/07/08 10:30 | Petra Krejsova v Katarzyna Piter | 2-6,2-6 |
| ITF Women Torun | 2018/06/26 16:05 | Katarzyna Piter v Marina Melnikova | 6-4,5-7,3-6 |