Stadium: Court A Round: 45 Ground: Hardcourt outdoor
| WTA Istanbul | 2019/04/22 11:55 | Jorovic, Ivana v Sizikova, Yana | 6-1,6-2 |
| WTA - Bogota | 2019/04/06 15:30 | Bolsova Zadoinov, Aliona v Sizikova, Yana | 7-5,6-0 |
| WTA Monterrey | 2019/03/30 16:00 | Sizikova, Yana v Andrea Gamiz | 4-6,1-6 |
| Irapuato, Singles W-ITF-MEX-02A | 2019/03/04 21:00 | Sizikova, Yana v Stefani, Luisa | 6-7,2-6 |
| 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 Shapatava, Sofia | 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 |
| WTA - Stuttgart | 2019/04/21 14:15 | Anna-Lena Friedsam v Lottner, Antonia | 6-2,3-6,7-6 |
| WTA - Stuttgart | 2019/04/20 13:20 | Paula Ormaechea v Lottner, Antonia | 1-6,1-6 |
| Lugano, Switzerland | 2019/04/11 16:45 | Lottner, Antonia v Pliskova, Kristyna | 2-6,4-6 |
| Lugano, Switzerland | 2019/04/09 16:05 | Bencic, Belinda v Lottner, Antonia | 5-7,2-6 |
| Lugano, Switzerland | 2019/04/08 08:30 | Haas, Barbara v Lottner, Antonia | 7-6,4-6,4-6 |
| Lugano, Switzerland | 2019/04/07 10:30 | Leonie Kung v Lottner, Antonia | 0-6,1-6 |
| ITF W60 Croissy-Beaubourg | 2019/03/27 19:30 | Diatchenko, Vitalia v Lottner, Antonia | 6-1,6-3 |
| ITF W60 Croissy-Beaubourg | 2019/03/26 12:55 | Lesley Pattinama Kerkhove v Lottner, Antonia | 7-6,4-6,6-7 |