Stadium: Court Central Round: 25
| Chiswick, Simples W-WITF-GBR-13A | 2017/08/10 09:30 | Diatchenko, Vitalia v Kostova, Elitsa | 6-3,6-2 |
| Chiswick, Simples W-WITF-GBR-13A | 2017/08/08 09:30 | Harriet Dart v Kostova, Elitsa | 6-7,6-3,1-6 |
| Prague, Singles W-WITF-CZE-06A | 2017/07/26 10:40 | Krejsova, Petra v Kostova, Elitsa | 4-6,7-6,6-0 |
| WTA Gstaad | 2017/07/18 10:05 | Caroline Garcia v Kostova, Elitsa | 7-5,6-1 |
| ITF Women Contrexeville | 2017/07/11 09:40 | Irina Maria Bara v Kostova, Elitsa | 6-4,6-0 |
| Wimbledon Women Qual | 2017/06/29 10:00 | Falconi, Irina v Kostova, Elitsa | 6-3,6-3 |
| Wimbledon Women Qual | 2017/06/27 10:00 | Kostova, Elitsa v Fangzhou Liu | 6-4,6-1 |
| ITF Women Warsaw | 2017/06/24 10:20 | Kostova, Elitsa v Karatantcheva, Sesil | 7-5,2-6,4-6 |
| ITF Women Lenzerheide | 2017/06/22 09:00 | Fiona Ganz v Silich, Alina | 1-6,3-6 |
| ITF Women Lenzerheide | 2017/06/20 11:00 | Valentina Ryser v Fiona Ganz | 2-6,4-6 |
| ITF Women Chiasso | 2017/04/18 09:50 | Kathinka Von Deichmann v Fiona Ganz | 6-0,6-0 |
| ITF Women Sion | 2016/08/30 07:30 | Arnold, Tamara v Fiona Ganz | 6-3,3-6,6-4 |