Stadium: Court 3 Round: 26 Ground: Hardcourt indoor
| ITF W25 Trnava | 2019/02/06 11:45 | Elitsa Kostova v Ganna Poznikhirenko | 6-2,6-1 |
| ITF W25 Singapore | 2019/01/25 02:00 | Elitsa Kostova v Lin Zhu | 3-6,2-6 |
| ITF W25 Singapore | 2019/01/24 02:00 | Elitsa Kostova v Charmaine S Y Seah | 6-3,6-0 |
| ITF W25 Singapore | 2019/01/22 03:40 | Elitsa Kostova v Naomi Broady | 6-2,6-2 |
| ITF W25 Singapore | 2019/01/17 02:00 | Elitsa Kostova v Sabina Sharipova | 3-6,6-2,4-6 |
| ITF W25 Singapore | 2019/01/16 02:00 | Elitsa Kostova v Charmaine S Y Seah | 6-2,6-2 |
| Australian Open Women | 2019/01/08 03:10 | Elitsa Kostova v Nicole Gibbs | 4-6,2-6 |
| ITF Women Las Vegas | 2018/11/07 19:35 | Elitsa Kostova v Fanny Stollar | 3-6,3-6 |
| ITF W25 Trnava | 2019/02/06 13:15 | Yana Sizikova v Sofia Shapatava | 6-1,7-5 |
| ITF W25 Kazan | 2019/01/24 07:00 | Katarzyna Kawa v Yana Sizikova | 6-2,6-4 |
| ITF W25 Kazan | 2019/01/23 11:35 | Valeriya Urzhumova v Yana Sizikova | 2-6,5-7 |
| ITF Women Dubai | 2018/12/08 13:05 | Eden Silva v Yana Sizikova | 6-3,6-4 |
| ITF Women Minsk | 2018/11/07 07:30 | Yana Sizikova v Raluca Georgiana Serban | 2-6,5-7 |
| ITF Women Minsk | 2018/11/06 09:45 | Valeriya Yushchenko v Yana Sizikova | 7-5,4-6,2-6 |
| WTA Mumbai | 2018/10/27 06:50 | Mahak Jain v Yana Sizikova | 3-6,6-3,7-5 |
| WTA Tianjin | 2018/10/06 06:40 | Yana Sizikova v Michaela Honcova | 6-4,6-2 |