Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
| Open d'Australie - Femmes | 2020/01/14 07:55 | Kostova, Elitsa v Harriet Dart | 4-6,1-6 |
| Houston, USA | 2019/11/11 16:00 | Hailey Baptiste v Kostova, Elitsa | 6-2,6-4 |
| ITF W60 Las Vegas | 2019/11/06 17:00 | Stephanie Wagner v Kostova, Elitsa | 7-5,6-2 |
| ITF W60 Toronto | 2019/11/01 18:05 | Flipkens, Kirsten v Kostova, Elitsa | 6-3,6-2 |
| ITF W60 Toronto | 2019/10/31 16:55 | Broady, Naomi v Kostova, Elitsa | 3-6,3-6 |
| ITF W60 Toronto | 2019/10/30 13:50 | Melodie Collard v Kostova, Elitsa | 2-6,6-4,1-6 |
| ITF W25 Istanbul | 2019/10/23 09:55 | Kostova, Elitsa v Anna Kubareva | 6-7,6-2,5-7 |
| ITF W25 Istanbul | 2019/10/22 12:40 | Kostova, Elitsa v Berfu Cengiz | 7-5,6-0 |
| ITF W25 Trnava | 2020/02/04 10:00 | Andrea Lazaro Garcia v Aneta Laboutkova | 6-3,6-4 |
| ITF W25 Trnava | 2020/02/03 08:30 | Andrea Lazaro Garcia v Pantuckova, Magdalena | 6-4,6-7,10-3 |
| ITF W25 Vero Beach | 2020/01/23 16:00 | Andrea Lazaro Garcia v Renata Zarazua | 4-6,2-6 |
| ITF W25 Daytona Beach | 2020/01/19 16:45 | Andrea Lazaro Garcia v Marie Benoit | 4-6,0-6 |
| ITF W25 Daytona Beach | 2020/01/18 16:40 | Guiomar Maristany Zuleta De Reales v Andrea Lazaro Garcia | 6-4,4-6,2-6 |
| ITF W25 Daytona Beach | 2020/01/17 15:00 | Andrea Lazaro Garcia v Dalma Galfi | 6-2,6-1 |
| ITF W25 Daytona Beach | 2020/01/16 16:40 | Renata Zarazua v Andrea Lazaro Garcia | 3-6,5-7 |
| ITF W25 Daytona Beach | 2020/01/15 14:30 | Pereira, Teliana v Andrea Lazaro Garcia | 6-7,5-7 |