Stadium: Court 3 Round: 25
| French Open Women Qual | 2018/05/23 08:00 | Kostova, Elitsa v Tamara Korpatsch | 4-6,6-2,3-6 |
| WTA Anning | 2018/05/03 04:00 | Peng, Shuai v Kostova, Elitsa | 6-1,6-0 |
| WTA Anning | 2018/05/02 03:00 | Kostova, Elitsa v Dalila Jakupovic | 7-6,0-6,6-1 |
| WTA Anning | 2018/05/01 03:00 | Kostova, Elitsa v Cako, Jacqueline | 6-4,6-1 |
| WTA Istanbul Qual | 2018/04/23 13:20 | Arantxa Rus v Kostova, Elitsa | 6-2,6-0 |
| WTA Istanbul Qual | 2018/04/22 12:00 | Kostova, Elitsa v Doi, Misaki | 6-4,6-2 |
| WTA - Bogota | 2018/04/13 14:00 | Dalila Jakupovic v Kostova, Elitsa | 6-2,6-2 |
| WTA - Bogota | 2018/04/11 21:00 | Nao Hibino v Kostova, Elitsa | 2-6,4-6 |
| ITF Women Stare Splavy Qual | 2018/06/04 12:35 | Martina Colmegna v Cechova, Karolina | 6-3,6-1 |
| ITF Women Stare Splavy Qual | 2018/06/04 08:00 | Martina Colmegna v Laura Svatikova | 6-3,6-1 |
| ITF Women Grado Qual | 2018/05/26 08:00 | Gabriela Ce v Martina Colmegna | 6-4,7-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/24 13:05 | Brescia, Georgia v Martina Colmegna | 6-1,6-4 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/23 12:00 | Martina Colmegna v Paula Ormaechea | 6-3,3-6,6-3 |
| ITF Women Chiasso Qual | 2018/04/15 09:30 | Knoll, Xenia v Martina Colmegna | 6-2,6-4 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/11 12:00 | Martina Colmegna v Detiuc, Anastasia | 6-4,2-6,6-7 |
| ITF Women Santa Margherita Qual | 2018/04/03 19:35 | Tamara Zidansek v Martina Colmegna | 7-5,6-1 |