Stadium: Court 2 Round: 54
| Manacor (Mallorca), Singles Quali W-WITF-ESP-01A | 2018/02/09 10:15 | Rosa Vicens Mas v Gerlach, Katharina | 6-3,3-6,1-6 |
| ITF Women Hechingen Qual | 2018/08/07 11:00 | Tamara Korpatsch v Gerlach, Katharina | 6-3,6-2 |
| ITF Women Hechingen Qual | 2018/08/06 15:00 | Januskova, Petra v Gerlach, Katharina | 0-6,4-6 |
| ITF Women Hechingen Qual | 2018/08/05 13:30 | Pantuckova, Gabriela v Gerlach, Katharina | 0-6,2-6 |
| ITF Women Bad Saulgau | 2018/08/03 16:00 | Gerlach, Katharina v Laura Siegemund | 0-6,1-6 |
| ITF Women Bad Saulgau | 2018/08/02 12:35 | Scholsen, Helene v Gerlach, Katharina | 3-6,3-6 |
| ITF Women Bad Saulgau | 2018/08/01 15:20 | Kordolaimi, Eleni v Gerlach, Katharina | 2-6,4-6 |
| ITF Women Horb | 2018/07/29 13:00 | Piter, Katarzyna v Gerlach, Katharina | 6-4,3-6,6-7 |
| ITF Women Horb | 2018/07/28 11:30 | Polina Leykina v Gerlach, Katharina | 1-6,4-6 |
| ITF Women Leipzig | 2018/08/13 16:30 | Rosa Vicens Mas v Heisen, Vivian | 6-3,3-6,4-6 |
| ITF Women Leipzig | 2018/08/12 09:00 | Rosa Vicens Mas v Munozova, Anette | 7-6,6-2 |
| WTA Mallorca Qual | 2018/06/17 10:35 | Rosa Vicens Mas v Sofia Kenin | 2-6,0-6 |
| Obidos, Singles W-WITF-POR-12A | 2018/06/15 14:30 | Rosa Vicens Mas v Nuria Parrizas-Diaz | 2-6,2-6 |
| Obidos, Singles W-WITF-POR-12A | 2018/06/14 13:00 | Lumsden, Maia v Rosa Vicens Mas | 5-7,6-4,3-6 |
| Obidos, Singles W-WITF-POR-12A | 2018/06/12 12:05 | Rosa Vicens Mas v Francesca Jones | 6-4,6-4 |
| ITF Women Obidos Qual | 2018/06/11 11:00 | Rosa Vicens Mas v de Lucas Perez, Yesica | 6-2,3-6,6-2 |
| Obidos, Singles W-WITF-POR-12A | 2018/06/08 15:00 | Rosa Vicens Mas v Nuria Parrizas-Diaz | 6-7,4-6 |