Stadium: Court 3 Round: 44 Ground: Hardcourt outdoor
| ITF W25 Trnava | 2020/02/13 11:35 | Irina Khromacheva v Kostova, Elitsa | 6-4,6-4 |
| ITF W25 Trnava | 2020/02/12 15:35 | Ayline Esina Samardzic v Kostova, Elitsa | 1-6,1-6 |
| ITF W25 Trnava | 2020/02/05 13:50 | Kostova, Elitsa v Andrea Lazaro Garcia | 3-6,3-6 |
| 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 |
| Open d'Australie - Femmes | 2020/01/17 04:05 | Harriet Dart v Gatto-Monticone, Giulia | 6-1,6-3 |
| Open d'Australie - Femmes | 2020/01/16 05:35 | Gatto-Monticone, Giulia v Di Giuseppe, Martina | 6-3,6-3 |
| Open d'Australie - Femmes | 2020/01/14 05:00 | Gatto-Monticone, Giulia v Fangzhou Liu | 6-2,6-0 |
| WTA Auckland | 2020/01/05 02:35 | Gatto-Monticone, Giulia v Isabella Shinikova | 6-2,4-6,4-6 |
| WTA Auckland | 2020/01/04 05:30 | Ana Bogdan v Gatto-Monticone, Giulia | 4-6,6-4,4-6 |
| Solarino, Simples W-ITF-ITA-32A | 2019/11/25 09:00 | Gatto-Monticone, Giulia v Jana Fett | 2-6,6-3,7-5 |
| Solarino, Simples W-ITF-ITA-32A | 2019/11/23 09:30 | Mrdeza, Tereza v Gatto-Monticone, Giulia | 5-7,3-6 |
| Solarino, Simples W-ITF-ITA-32A | 2019/11/22 10:45 | Gatto-Monticone, Giulia v Saez Larra, Olga | 7-6,6-3 |