| WTA - Praga | 04/27 09:15 | 45 | [421] Yana Sizikova v Antonia Lottner [162] | 2-6,1-6 | |
| WTA - Istanbul | 04/22 11:55 | 64 | [104] Ivana Jorovic v Yana Sizikova [421] | 6-1,6-2 | |
| WTA - Istanbul | 04/21 13:05 | 45 | [418] Yana Sizikova v Danka Kovinic [160] | Retired | |
| WTA - Bogota | 04/06 15:30 | 45 | [147] Aliona Bolsova v Yana Sizikova [379] | 7-5,6-0 | |
| WTA - Monterrey | 03/30 16:00 | 45 | [356] Yana Sizikova v Andrea Gamiz [351] | 4-6,1-6 | |
| ITF - W25 Irapuato | 03/04 21:00 | 45 | Yana Sizikova v Luisa Stefani | 6-7,2-6 | |
| ITF - W25 Trnava | 02/07 12:00 | 26 | [227] Elitsa Kostova v Yana Sizikova [355] | 6-3,6-2 | |
| ITF - W25 Trnava | 02/06 13:15 | 25 | Yana Sizikova v Sofia Shapatava | 6-1,7-5 | |
| ITF - W25 Kazan | 01/24 07:00 | 26 | [269] Katarzyna Kawa v Yana Sizikova [356] | 6-2,6-4 | |
| ITF - W25 Kazan | 01/23 11:35 | 25 | Valeriya Urzhumova v Yana Sizikova | 2-6,5-7 | |
| ITF Women Dubai | 12/08 13:05 | 54 | [498] Eden Silva v Yana Sizikova [371] | 6-3,6-4 | |
| ITF Women Minsk | 11/07 07:30 | 26 | [384] Yana Sizikova v Raluca Georgiana Serban [242] | 2-6,5-7 | |
| ITF Women Minsk | 11/06 09:45 | 25 | Valeriya Yushchenko v Yana Sizikova | 7-5,4-6,2-6 | |
| WTA - Mumbai | 10/27 06:50 | 64 | Mahak Jain v Yana Sizikova | 3-6,6-3,7-5 | |
| WTA Tianjin | 10/07 04:20 | 64 | [123] Veronika Kudermetova v Yana Sizikova [385] | Retired | |
| WTA Tianjin | 10/06 06:40 | 45 | [385] Yana Sizikova v Michaela Honcova [275] | 6-4,6-2 | |
| ITF Women Almaty | 08/30 05:00 | 27 | Yuliya Hatouka v Yana Sizikova | 7-5,6-1 | |
| ITF Women Almaty | 08/29 06:35 | 26 | Daria Lodikova v Yana Sizikova | 1-6,6-7 | |
| ITF Women Almaty | 08/28 10:15 | 25 | Tereza Mihalikova v Yana Sizikova | 3-6,5-7 | |
| ITF Women Moscow | 08/22 11:30 | 26 | Yana Sizikova v Valeriya Yushchenko | 4-6,1-6 | |
| ITF Women Moscow | 08/20 07:00 | 25 | Yana Sizikova v Vitalia Stamat | 6-0,6-2 | |
| ITF Women LPD Gran Canaria | 08/09 10:00 | 27 | [465] Irene B Escorihuela v Yana Sizikova [385] | 6-1,3-6,7-6 | |
| ITF Women LPD Gran Canaria | 08/08 11:30 | 26 | [385] Yana Sizikova v Andrea Gamiz [284] | 2-6,6-4,7-5 | |
| ITF Women LPD Gran Canaria | 08/06 09:00 | 25 | Carlota M Megias v Yana Sizikova | 4-6,5-7 | |
| WTA Moscow Qual | 07/23 10:30 | 64 | [386] Yana Sizikova v Martina Trevisan [189] | 6-3,2-6,2-6 | |
| WTA Moscow Qual | 07/23 07:00 | 45 | [476] Rika Fujiwara v Yana Sizikova [386] | 1-6,4-6 | |
| WTA Moscow Qual | 07/22 13:00 | 45 | Maryna Zanevska v Yana Sizikova | Cancelled | |
| WTA Gstaad Qual | 07/14 09:10 | 45 | [159] Conny Perrin v Yana Sizikova [387] | 6-4,6-4 | |
| ITF Women Getxo | 07/10 08:00 | 25 | [387] Yana Sizikova v Olga Saez Larra [263] | 4-6,1-6 | |
| ITF Women Ilkley Qual | 06/17 11:35 | 54 | [339] Abigail Tere-Apisah v Yana Sizikova [378] | 6-3,6-2 |