Stadium: Centre Court Round: 25 Ground: Clay
| Manacor (Mallorca), Singles Quali W-WITF-ESP-01A | 2018/02/08 08:30 | Lucia Cortez Llorca v Gerlach, Katharina | 1-6,6-7 |
| ITF W25 LPD Gran Canaria | 2020/11/16 10:15 | Laura Pigossi v Lucia Cortez Llorca | 7-6,6-3 |
| ITF W25 LPD Gran Canaria | 2020/11/15 10:15 | Barnett, Alicia v Lucia Cortez Llorca | 6-4,1-6,8-10 |
| ITF W15 Castellon | 2020/11/03 09:30 | Naya, Guillermina v Lucia Cortez Llorca | 6-1,6-3 |
| ITF W15 Platja D'Aro | 2020/10/27 10:30 | Lucia Cortez Llorca v Alina Charaeva | 6-3,6-7,3-6 |
| ITF W15 Funchal | 2020/10/15 09:25 | Lucia Cortez Llorca v Beatriz Haddad Maia | 2-6,1-6 |
| ITF W15 Funchal | 2020/10/14 11:15 | Lucia Cortez Llorca v Matilde Jorge | 7-5,6-2 |
| ITF W15 Melilla | 2020/09/18 15:35 | Matilda Mutavdzic v Lucia Cortez Llorca | 6-2,6-0 |
| ITF W15 Melilla | 2020/09/17 13:00 | Krasnova, Daria v Lucia Cortez Llorca | 3-6,2-6 |
| ITF W25 LPD Gran Canaria | 2020/11/17 15:30 | Gerlach, Katharina v Hogenkamp, Richel | 2-6,6-4,3-6 |
| WTA - Linz | 2020/11/07 10:15 | Irina Maria Bara v Gerlach, Katharina | 2-6,6-3,6-4 |
| ITF W25 Reims | 2020/10/21 12:40 | Harmony Tan v Gerlach, Katharina | 6-0,6-0 |
| ITF W25 Reims | 2020/10/19 09:55 | Gerlach, Katharina v Lumsden, Maia | 7-5,6-3 |
| ITF W25 Reims | 2020/10/18 08:00 | Gerlach, Katharina v Le Bihan, Kelia | 6-1,6-4 |
| ITF W25 Cherbourg | 2020/10/11 17:40 | Gerlach, Katharina v Selena Janicijevic | 3-6,0-6 |
| ITF W25 Grado | 2020/09/16 16:15 | Sina Herrmann v Gerlach, Katharina | 6-3,6-4 |
| ITF W25 Tarvisio | 2020/09/10 14:05 | Francesca Jones v Gerlach, Katharina | 6-0,7-5 |