Stadium: Court P. Dominguez Round: 25 Ground: Clay
| ITF W100 Contrexeville | 2021/07/08 10:00 | Elitsa Kostova v Dalma Galfi | 6-7,1-6 |
| ITF W100 Contrexeville | 2021/07/06 11:45 | Ulrikke Eikeri v Elitsa Kostova | 4-6,6-3,4-6 |
| Wimbledon Women | 2021/06/24 10:00 | Elitsa Kostova v Xinyu Wang | 2-6,1-6 |
| Wimbledon Women | 2021/06/23 10:00 | Elitsa Kostova v Destanee Aiava | 6-4,7-5 |
| ITF W25 Madrid | 2021/06/11 07:15 | Robin Anderson v Elitsa Kostova | 7-6,6-2 |
| ITF W25 Madrid | 2021/06/10 10:35 | Yvonne Cavalle-Reimers v Elitsa Kostova | 6-3,2-6,5-7 |
| ITF W25 Madrid | 2021/06/09 09:05 | Ganna Poznikhirenko v Elitsa Kostova | 3-6,3-6 |
| French Open Women | 2021/05/26 08:30 | Elitsa Kostova v Ekaterine Gorgodze | 6-7,3-6 |
| ITF W60 Biarritz | 2021/07/13 09:50 | Estelle Cascino v Kamilla Bartone | 6-0,6-2 |
| ITF W60 Biarritz | 2021/07/12 13:05 | Estelle Cascino v Shanice Roignot | 6-1,6-0 |
| ITF W100 Contrexeville | 2021/07/05 15:35 | Estelle Cascino v Oksana Selekhmeteva | 1-6,3-6 |
| ITF W100 Contrexeville | 2021/07/04 15:00 | Estelle Cascino v Ema Bolebruchova | 6-2,6-1 |
| ITF W25 Porto | 2021/06/22 09:55 | Anna Kubareva v Estelle Cascino | 6-4,6-3 |
| ITF W25 Porto | 2021/06/21 15:00 | Adrienn Nagy v Estelle Cascino | 4-6,2-6 |
| ITF W25 Figueira Da Foz | 2021/06/16 10:25 | Vlada Koval v Estelle Cascino | 6-4,6-4 |
| ITF W25 Figueira Da Foz | 2021/06/14 10:55 | Estelle Cascino v Elizabet Hamaliy | 6-4,6-3 |