Stadium: Court 3 Round: 27 Ground: Clay
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/03/14 14:35 | Kostova, Elitsa v Shapatava, Sofia | 7-5,7-5 |
| Acapulco, Mexico, Qualifying | 2018/02/25 03:20 | Rebecca Peterson v Kostova, Elitsa | 7-5,6-1 |
| ITF Women Rancho Santa Fe | 2018/02/23 20:10 | Kostova, Elitsa v Nara, Kurumi | 6-7,0-6 |
| ITF Women Rancho Santa Fe | 2018/02/22 23:40 | Lao, Danielle v Kostova, Elitsa | 6-4,1-6,3-6 |
| ITF Women Rancho Santa Fe | 2018/02/21 20:30 | Kostova, Elitsa v Ashley Lahey | 4-6,6-3,6-1 |
| ITF Women Surprise | 2018/02/15 20:45 | Boserup, Julia v Kostova, Elitsa | 7-5,3-6,6-1 |
| Newport Beach, USA | 2018/01/23 18:00 | Rebecca Peterson v Kostova, Elitsa | 4-6,6-3,7-5 |
| WTA Newport Beach Qual | 2018/01/21 18:00 | Caroline Dolehide v Kostova, Elitsa | 4-6,4-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/03/15 15:00 | Anastasia Grymalska v Cagla Buyukakcay | 7-5,7-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/03/14 13:00 | Panna Udvardy v Anastasia Grymalska | 2-6,3-6 |
| ITF Women Santa Margherita Qual | 2018/03/13 13:00 | Anastasia Grymalska v Claudia Giovine | 6-1,6-3 |
| ITF Women Hammamet | 2018/03/04 09:00 | Anastasia Grymalska v Rosca, Andreea Amalia | 2-6,2-6 |
| ITF Women Hammamet | 2018/03/03 09:00 | Anastasia Grymalska v Marfutina, Maria | 6-2,7-5 |
| ITF Women Hammamet | 2018/03/02 09:00 | Anastasia Grymalska v Eklund, Mia | 6-3,6-1 |
| ITF Women Hammamet | 2018/02/28 10:20 | Anastasia Grymalska v Clara Burel | 6-3,7-6 |
| ITF Women Hammamet | 2018/02/24 09:00 | Anastasia Grymalska v Yerolymos, Margot | 4-6,3-6 |