Stadium: Stadium Round: 45 Ground: Hardcourt indoor
| Wimbledon Women Qual | 2014/06/17 12:50 | Indy De Vroome v Risa Ozaki | 6-2,3-6,6-8 |
| ITF Women Santa Margherita | 2018/10/02 13:50 | Reka-Luca Jani v Elitsa Kostova | 7-5,4-6,6-1 |
| ITF Women Santa Margherita | 2018/09/28 12:00 | Elitsa Kostova v Ludmilla Samsonova | 3-6,4-6 |
| ITF Women Santa Margherita | 2018/09/27 12:00 | Elitsa Kostova v Irene Burillo Escorihuela | 6-0,5-7,6-2 |
| ITF Women Santa Margherita | 2018/09/25 17:15 | Elitsa Kostova v Jule Niemeier | 7-5,6-1 |
| ITF Women Saint Malo | 2018/09/18 10:20 | Elitsa Kostova v Cagla Buyukakcay | 6-7,4-6 |
| ITF Women Biarritz | 2018/09/12 13:25 | Carina Witthoeft v Elitsa Kostova | 6-4,7-6 |
| ITF Women Zagreb | 2018/09/06 16:50 | Elitsa Kostova v Tena Lukas | 6-1,2-6,3-6 |
| ITF Women Zagreb | 2018/09/05 16:15 | Elitsa Kostova v Agnes Bukta | 6-3,6-4 |