| UTR Pro Tennis Series Pazardzhik Women | 2021/05/03 08:30 | Ralitsa Alexandrova v Doroteja Petrovic | 6-1,5-4 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/24 12:00 | Stefana Lazar v Ralitsa Alexandrova | 6-2,5-1 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/22 11:30 | Ralitsa Alexandrova v Doroshina, Olga | 2-6,1-6 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/22 08:30 | Ralitsa Alexandrova v Darja Semenistaja | 7-6,2-6,1-6 |
| UTR Pro Tennis Series Bucharest Women | 2021/04/19 12:20 | Ralitsa Alexandrova v Marko, Iulia | 6-2,6-2 |
| ITF - W15 Antalya | 2021/04/05 07:00 | Lucie Havlickova v Ralitsa Alexandrova | 6-3,6-4 |
| ITF - W15 Antalya | 2021/03/30 07:00 | Dagan Fruchtman, Mika v Ralitsa Alexandrova | 6-3,6-3 |
| ITF - W15 Antalya | 2021/03/29 07:00 | Ralitsa Alexandrova v Leyre Romero Gormaz | 2-6,7-5,13-11 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/03 08:30 | Kostova, Elitsa v Ani Vangelova | 6-1,5-0 |
| ITF W60 Bellinzona | 2021/04/05 13:20 | Turati, Bianca v Kostova, Elitsa | 6-4,6-4 |
| ITF W25 Dubai | 2021/04/01 06:25 | Kostova, Elitsa v Hatouka, Yuliya | 2-6,5-7 |
| ITF W25 Dubai | 2021/03/31 07:40 | Lesley Pattinama Kerkhove v Kostova, Elitsa | 2-6,5-7 |
| ITF W25 Dubai | 2021/03/30 10:50 | Kostova, Elitsa v Sharipova, Sabina | 6-4,4-6,6-1 |
| Open d'Australie - Femmes | 2021/01/10 12:55 | Lottner, Antonia v Kostova, Elitsa | 6-4,7-5 |
| ITF W25 LPD Gran Canaria | 2020/11/18 13:00 | Kostova, Elitsa v Jule Niemeier | 3-6,0-6 |
| French Open Women | 2020/09/24 08:00 | Kostova, Elitsa v Niculescu, Monica | 0-6,7-6,3-6 |