Stadium: Stadium Round: 45 Ground: Hardcourt outdoor
| ITF W25 Trnava | 2019/02/07 12:00 | Kostova, Elitsa v Sizikova, Yana | 6-3,6-2 |
| ITF W25 Trnava | 2019/02/06 13:15 | Sizikova, Yana v Sofia Shapatava | 6-1,7-5 |
| ITF W25 Kazan | 2019/01/24 07:00 | Katarzyna Kawa v Sizikova, Yana | 6-2,6-4 |
| ITF W25 Kazan | 2019/01/23 11:35 | Urzhumova, Valeriya v Sizikova, Yana | 2-6,5-7 |
| ITF Women Dubai | 2018/12/08 13:05 | Eden Silva v Sizikova, Yana | 6-3,6-4 |
| ITF Women Minsk | 2018/11/07 07:30 | Sizikova, Yana v Raluca Georgiana Serban | 2-6,5-7 |
| ITF Women Minsk | 2018/11/06 09:45 | Valeriya Yushchenko v Sizikova, Yana | 7-5,4-6,2-6 |
| WTA - Mumbaï | 2018/10/27 06:50 | Jain, Mahak v Sizikova, Yana | 3-6,6-3,7-5 |
| Surprise, Singles W-ITF-USA-04A | 2019/02/11 17:30 | Stefani, Luisa v Maria F Herazo Gonzalez | 3-6,4-6 |
| Petit-Bourg, Singles Qualifying W-ITF-FRA-02A | 2019/01/16 21:10 | Haruna Arakawa v Stefani, Luisa | 6-4,7-6 |
| Petit-Bourg, Singles Qualifying W-ITF-FRA-02A | 2019/01/15 15:00 | Stefani, Luisa v Kennel, Karin | 7-5,5-7,10-6 |
| Petit-Bourg, Singles Qualifying W-ITF-FRA-02A | 2019/01/14 15:15 | Stefani, Luisa v Tranberg, Mathilde | 6-0,6-0 |
| ITF Women Colina | 2018/11/09 19:30 | Stefani, Luisa v Paula Ormaechea | 4-6,3-6 |
| ITF Women Colina | 2018/11/08 14:00 | Stefani, Luisa v Panna Udvardy | 6-3,6-4 |
| ITF Women Colina | 2018/11/07 15:35 | Zoe Kruger v Stefani, Luisa | 4-6,4-6 |
| ITF Women Colina | 2018/11/05 14:00 | Lopez, Daniela Macarena v Stefani, Luisa | 4-6,4-6 |