| UTR Pro Tennis Series Pazardzhik Women | 2021/05/07 10:00 | Doroteja Petrovic v Elitsa Kostova | 1-6,0-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/06 10:00 | Mirela Shkumbova v Elitsa Kostova | 1-6,0-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/04 11:30 | Ralitsa Alexandrova v Elitsa Kostova | 2-6,0-6 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/03 08:30 | Elitsa Kostova v Ani Vangelova | 6-1,5-0 |
| ITF W60 Bellinzona | 2021/04/05 13:20 | Bianca Turati v Elitsa Kostova | 6-4,6-4 |
| ITF W25 Dubai | 2021/04/01 06:25 | Elitsa Kostova v Yuliya Hatouka | 2-6,5-7 |
| ITF W25 Dubai | 2021/03/31 07:40 | Lesley Pattinama Kerkhove v Elitsa Kostova | 2-6,5-7 |
| ITF W25 Dubai | 2021/03/30 10:50 | Elitsa Kostova v Sabina Sharipova | 6-4,4-6,6-1 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/07 08:30 | Daria Shalamanova v Luisa Meyer Auf Der Heide | 6-4,4-6,7-5 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/05 10:30 | Daria Shalamanova v Iva Ivanova | 6-1,6-3 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/04 07:00 | Daria Shalamanova v Ioana Gaspar | 7-6,6-2 |
| UTR Pro Tennis Series Pazardzhik Women | 2021/05/03 11:30 | Silvia Maria Costache v Daria Shalamanova | 0-6,1-5 |
| ITF W15 Antalya | 2021/04/13 07:00 | Daria Shalamanova v Tina Cvetkovic | 2-6,3-6 |
| ITF W15 Antalya | 2021/04/12 09:00 | Jenny Duerst v Daria Shalamanova | 3-6,5-7 |
| ITF W15 Antalya | 2021/04/06 07:00 | Ekaterina Shalimova v Daria Shalamanova | 6-2,6-1 |
| ITF W15 Antalya | 2021/04/05 07:00 | Daria Shalamanova v Nicole Khirin | 2-6,6-1,10-5 |