Stadium: Reinert Center Court Round: 25 Ground: Clay
| ITF W25 Stuttgart | 2019/07/02 16:30 | Gerlach, Katharina v Caroline Werner | 0-6,3-6 |
| ITF W25 Darmstadt | 2019/06/25 15:45 | Govortsova, Olga v Gerlach, Katharina | 6-1,6-1 |
| ITF W25 Klosters | 2019/06/19 07:00 | Gerlach, Katharina v Zuger, Joanne | 4-6,2-6 |
| Nuremberg, Germany | 2019/05/19 10:15 | Cepelova, Jana v Gerlach, Katharina | 3-6,6-4,6-4 |
| Nuremberg, Germany | 2019/05/18 12:35 | Gerlach, Katharina v Pemra Ozgen | 6-3,6-0 |
| Wiesbaden, Simples W-ITF-GER-03A | 2019/05/01 12:10 | Gerlach, Katharina v Zaja, Anna | 4-6,6-3,0-6 |
| Tunis, Singles W-ITF-TUN-21A | 2019/04/11 11:50 | Lara Salden v Gerlach, Katharina | 6-2,7-5 |
| Tunis, Singles W-ITF-TUN-21A | 2019/04/10 12:00 | Caregaro, Martina v Gerlach, Katharina | 7-5,1-6,3-6 |
| ITF W25 Denain | 2019/07/06 12:30 | Katharina Hobgarski v Kostova, Elitsa | 6-1,6-3 |
| ITF W25 Denain | 2019/07/05 11:25 | Valeriya Strakhova v Kostova, Elitsa | 3-6,4-6 |
| ITF W25 Denain | 2019/07/04 08:00 | Kurata, Nathaly v Kostova, Elitsa | 6-4,0-6,1-6 |
| ITF W25 Denain | 2019/07/03 10:00 | Poznikhirenko, Ganna v Kostova, Elitsa | 3-6,3-6 |
| Montpellier, Singles W-ITF-FRA-17A | 2019/06/20 13:00 | Kostova, Elitsa v Halbauer, Elizabeth | 1-6,4-6 |
| Montpellier, Singles W-ITF-FRA-17A | 2019/06/19 14:00 | Kostova, Elitsa v Molinaro, Eleonora | 7-6,6-3 |
| ITF W25 Prerov | 2019/06/16 08:00 | Anhelina Kalinina v Kostova, Elitsa | 6-1,4-6,6-1 |
| ITF W25 Prerov | 2019/06/15 09:50 | Kostova, Elitsa v Carreras, Amanda | 6-2,6-3 |