Stadium: Court 4 Round: 26 Ground: Hardcourt indoor
| Wimbledon Women Qual | 2018/06/26 10:00 | Jamie Loeb v Elitsa Kostova | 1-6,7-5,6-1 |
| ITF Women Manchester | 2018/06/13 10:00 | Viktorija Golubic v Elitsa Kostova | 6-3,6-4 |
| ITF Women Stare Splavy | 2018/06/09 12:30 | Elitsa Kostova v Rebecca Sramkova | 7-5,4-6,4-6 |
| ITF Women Stare Splavy | 2018/06/08 11:15 | Elitsa Kostova v Ani Mijacika | 6-2,2-6,6-4 |
| ITF Women Stare Splavy | 2018/06/07 09:30 | Elitsa Kostova v Anna Bondar | 6-3,3-6,6-1 |
| ITF Women Stare Splavy | 2018/06/06 09:50 | Elitsa Kostova v Martina Colmegna | 6-4,6-7,7-6 |
| French Open Women Qual | 2018/05/23 08:00 | Elitsa Kostova v Tamara Korpatsch | 4-6,6-2,3-6 |
| WTA Anning | 2018/05/03 04:00 | Shuai Peng v Elitsa Kostova | 6-1,6-0 |
| ITF Women Versmold Qual | 2018/07/10 11:00 | Kimberley Zimmermann v Angelica Moratelli | 6-7,1-6 |
| ITF Women Versmold Qual | 2018/07/09 12:00 | Kimberley Zimmermann v Anastasia Detiuc | 6-4,2-6,6-2 |
| ITF Women Aschaffenburg | 2018/07/03 13:15 | Polina Leykina v Kimberley Zimmermann | 6-3,6-4 |
| ITF Women Stuttgart | 2018/06/26 12:50 | Kimberley Zimmermann v Dalma Galfi | 5-7,2-6 |
| ITF Women Essen | 2018/06/14 15:00 | Kimberley Zimmermann v Cindy Burger | 4-6,3-6 |
| ITF Women Essen | 2018/06/13 13:30 | Patty Schnyder v Kimberley Zimmermann | 5-7,6-4,2-6 |
| ITF Women Essen | 2018/06/12 12:00 | Michele Erkens v Kimberley Zimmermann | 2-6,2-6 |
| ITF Women Stare Splavy | 2018/06/08 08:00 | Monika Kilnarova v Kimberley Zimmermann | 1-6,6-4,6-0 |