Stadium: Court 4 Round: 25 Ground: Clay
| ITF W60 Jinan | 2019/08/26 09:00 | Chang Liu v Yana Sizikova | 6-4,6-1 |
| ITF W60 - Hechingen | 2019/08/08 13:00 | Yana Sizikova v Laura Ioana Paar | 3-6,2-6 |
| ITF W60 - Hechingen | 2019/08/08 08:00 | Yana Sizikova v Anna Gabric | 6-0,4-6,6-2 |
| ITF W25 - Perigueux | 2019/06/27 07:00 | Harmony Tan v Yana Sizikova | 6-4,6-2 |
| ITF W25 - Perigueux | 2019/06/26 07:00 | Yana Sizikova v Daria Mishina | 6-3,7-5 |
| ITF W25 - Madrid | 2019/06/19 15:55 | Adithya Karunaratne v Yana Sizikova | 6-7,6-3,6-7 |
| WTA - Praag | 2019/04/27 09:15 | Yana Sizikova v Antonia Lottner | 2-6,1-6 |
| WTA - Istanbul | 2019/04/22 11:55 | Ivana Jorovic v Yana Sizikova | 6-1,6-2 |
| ITF W60 Changsha | 2019/09/03 02:00 | Olivia Tjandramulia v Oleksandra Oliynykova | 6-3,3-6,7-10 |
| ITF W60 Changsha | 2019/09/02 05:05 | Meng Yi Chen v Oleksandra Oliynykova | 3-6,6-4,8-10 |
| ITF W25 Cordenons | 2019/08/07 08:45 | Martina Caregaro v Oleksandra Oliynykova | 6-1,7-6 |
| ITF W25 Sezze | 2019/07/30 08:00 | Oleksandra Oliynykova v Aurora Zantedeschi | 3-6,6-4,3-10 |
| ITF W25 Sezze | 2019/07/29 10:00 | Oleksandra Oliynykova v Ginevra Aprea | 6-0,6-1 |
| ITF W25 Baja | 2019/07/17 12:35 | Oleksandra Oliynykova v Dejana Radanovic | 6-4,1-6,1-6 |
| ITF W25 Baja | 2019/07/16 09:45 | Oleksandra Oliynykova v Izabela Gabriela Novac | 6-4,6-4 |
| ITF W15 - Prokuplje | 2019/07/05 08:55 | Oleksandra Oliynykova v Ana L De La Nuez | 6-7,2-6 |