Stadium: Court 3 Round: 27
| 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 |
| WTA Newport Beach Qual | 2018/01/20 20:15 | Emina Bektas v Kostova, Elitsa | 2-6,7-5,1-6 |
| Australian Open Women Qual | 2018/01/13 02:15 | Kostova, Elitsa v Satralova, Denisa | 6-7,2-6 |
| Australian Open Women Qual | 2018/01/10 23:00 | Muhammad, Asia v Kostova, Elitsa | 1-6,6-3,5-7 |
| ITF Women Rancho Santa Fe | 2018/02/22 21:45 | Allie Kiick v Nara, Kurumi | 0-6,2-6 |
| ITF Women Rancho Santa Fe | 2018/02/22 01:35 | Robin Anderson v Nara, Kurumi | 2-6,3-6 |
| Fed Cup, Groupe Mondial | 2018/02/10 04:30 | Diyas, Zarina v Nara, Kurumi | 5-7,4-6 |
| Fed Cup, Groupe Mondial | 2018/02/08 04:30 | Nara, Kurumi v Jeong, Sunam | 6-3,6-0 |
| Fed Cup, Groupe Mondial | 2018/02/07 04:30 | Nara, Kurumi v Peangtarn Plipuech | 6-0,6-2 |
| Taipei, Taipei Chinois | 2018/01/30 04:00 | Nara, Kurumi v Parmentier, Pauline | 6-1,4-6,1-6 |
| Open d'Australie - Femmes | 2018/01/16 00:00 | Nara, Kurumi v Marketa Vondrousova | 5-7,4-6 |
| WTA - Hobart | 2018/01/08 03:35 | Nara, Kurumi v Elise Mertens | 0-6,4-6 |