Stadium: Court 1 Round: 25 Ground: Clay
| ITF W15 Haabneeme | 2020/11/17 08:00 | Kostenko, L. v Glanzer, Daniela | 3-6,2-6 |
| ITF W25 Frydek Mistek | 2020/09/13 09:00 | Shoshyna, Anastasiya v Kostenko, L. | 6-1,6-0 |
| ITF W15 Varna | 2020/09/10 07:55 | Rosca, Ioana Loredana v Kostenko, L. | 6-0,6-2 |
| ITF W15 Varna | 2020/09/09 10:45 | Ilay Yoruk v Kostenko, L. | 5-7,6-7 |
| ITF - W15 Antalya | 2020/02/20 08:40 | Kostenko, L. v Stokke, Melanie | 7-6,7-5 |
| ITF - W15 Antalya | 2020/02/19 06:50 | Stevens, Lexie v Kostenko, L. | 4-6,2-6 |
| ITF - W15 Antalya | 2019/11/14 06:30 | Kostenko, L. v Ipek Oz | 3-6,0-6 |
| ITF - W15 Antalya | 2019/11/13 09:50 | Haine Ogata v Kostenko, L. | 4-6,1-6 |
| ITF W15 Cairo | 2020/12/12 08:00 | Mishina, Daria v Elina Avanesyan | 4-6,4-6 |
| ITF W15 Cairo | 2020/12/11 08:00 | Mishina, Daria v Ziva Falkner | 7-6,6-2 |
| ITF W15 Cairo | 2020/12/10 10:10 | Mishina, Daria v Nikitina, Iuliia | 6-3,6-1 |
| ITF W15 Cairo | 2020/12/09 14:45 | Mishina, Daria v Zhibek Kulambayeva | 6-0,6-4 |
| ITF W15 Cairo | 2020/12/03 09:00 | Mishina, Daria v Zhibek Kulambayeva | 3-6,6-3,3-6 |
| ITF W15 Cairo | 2020/12/02 08:00 | Mishina, Daria v Ziouti, Salma | 6-2,6-0 |
| ITF W15 Cairo | 2020/11/29 08:00 | Mishina, Daria v Carolina Alves | 5-7,4-6 |
| ITF W15 Cairo | 2020/11/28 09:20 | Mishina, Daria v Jessie Aney | 6-2,6-4 |