Stadium: Court 1 Round: 64 Ground: Carpet indoor
| ITF W15 Guatemala | 2019/11/06 16:00 | Anttila, Alexandra v Riley, Alexandra | 6-3,4-6,6-4 |
| ITF W25 Lagos | 2019/10/16 13:15 | Tamara Curovic v Riley, Alexandra | 6-3,6-2 |
| ITF W25 Lagos | 2019/10/09 08:30 | Riley, Alexandra v Sada Nahimana | 1-6,2-6 |
| Pretoria, Singles W-ITF-RSA-02A | 2019/10/03 07:30 | Riley, Alexandra v Zeel Desai | 1-6,2-6 |
| Pretoria, Singles W-ITF-RSA-02A | 2019/10/01 10:30 | Onya, Allyson Nancy v Riley, Alexandra | 5-7,3-6 |
| Johannesburg, Singles W-ITF-RSA-01A | 2019/09/26 09:30 | Riley, Alexandra v Neuwirth, Yvonne | 5-7,5-7 |
| Johannesburg, Singles W-ITF-RSA-01A | 2019/09/25 09:40 | Langa, Mbali v Riley, Alexandra | 2-6,1-6 |
| ITF W25 Guayaquil | 2019/08/19 16:30 | Riley, Alexandra v Emiliana Arango | 2-6,1-6 |
| St. Etienne, Singles W-ITF-FRA-28A | 2019/11/05 10:15 | Ferrando, Cristiana v Sizikova, Yana | 7-5,6-2 |
| St. Etienne, Singles W-ITF-FRA-28A | 2019/11/04 17:40 | Sizikova, Yana v Angelica Moratelli | 7-5,6-2 |
| ITF W60 Nantes | 2019/10/28 09:00 | Gravouil, Theo v Sizikova, Yana | 6-3,7-6 |
| WTA Tashkent | 2019/09/21 10:20 | Tereza Martincova v Sizikova, Yana | 6-3,6-0 |
| Changsha, Simples W-ITF-CHN-19A | 2019/09/05 02:00 | Natalija Stevanovic v Sizikova, Yana | 6-3,6-0 |
| Changsha, Simples W-ITF-CHN-19A | 2019/09/04 03:45 | Sizikova, Yana v Oleksandra Oliynykova | 6-3,6-4 |
| Jinan, Qualifications Simples W-ITF-CHN-18A | 2019/08/26 09:00 | Liu, Chang v Sizikova, Yana | 6-4,6-1 |
| ITF W60 Hechingen | 2019/08/08 13:00 | Sizikova, Yana v Laura Ioana Paar | 3-6,2-6 |