Stadium: Cancha 1 Round: 25 Ground: Clay
| WTA - Bogota | 2019/04/07 18:25 | Irina Maria Bara v Kostova, Elitsa | 3-6,6-2,6-3 |
| WTA - Bogota | 2019/04/06 19:10 | Kostova, Elitsa v Zoe Hives | 6-7,7-5,6-0 |
| Palm Harbor, Fl, Qualifications Simples W-ITF-USA-08A | 2019/04/05 16:00 | Kovinic, Danka v Kostova, Elitsa | 7-6,3-6,6-2 |
| Palm Harbor, Fl, Qualifications Simples W-ITF-USA-08A | 2019/04/04 15:50 | Honcova, Michaela v Kostova, Elitsa | 2-6,5-7 |
| Palm Harbor, Fl, Qualifications Simples W-ITF-USA-08A | 2019/04/03 17:15 | Carrington, Safiya v Kostova, Elitsa | 0-6,3-6 |
| Campinas, Singles Qualifying W-ITF-BRA-03A | 2019/03/29 13:00 | Kostova, Elitsa v Jessica Pieri | 6-7,2-6 |
| Campinas, Singles Qualifying W-ITF-BRA-03A | 2019/03/28 16:10 | Haas, Barbara v Kostova, Elitsa | 6-1,2-6,0-6 |
| Campinas, Singles Qualifying W-ITF-BRA-03A | 2019/03/27 13:00 | Kostova, Elitsa v Maria F Herazo Gonzalez | 6-2,6-3 |
| WTA - Charleston | 2019/04/02 17:00 | Varvara Lepchenko v Petkovic, Andrea | 0-6,4-6 |
| WTA Guadalajara | 2019/03/11 22:00 | Varvara Lepchenko v Conny Perrin | 3-6,2-6 |
| WTA Guadalajara | 2019/03/10 18:50 | Varvara Lepchenko v Andrea Gamiz | 6-2,6-2 |
| WTA Guadalajara | 2019/03/09 21:25 | Varvara Lepchenko v Anna Danilina | 6-2,6-3 |
| WTA - Indian Wells | 2019/03/04 20:35 | Zarina Diyas v Varvara Lepchenko | 6-4,7-5 |
| WTA - Indian Wells | 2019/02/27 19:25 | Varvara Lepchenko v Sara Sorribes Tormo | 6-7,2-6 |
| WTA - Indian Wells | 2019/02/26 18:00 | Kateryna Baindl v Varvara Lepchenko | 0-6,3-6 |
| WTA - Doha | 2019/02/09 12:40 | Varvara Lepchenko v Mrdeza, Tereza | 7-6,4-6,3-6 |