Stadium: Court 2 Round: 24 Ground: Clay
| ITF - W25 Dubai | 2021/03/30 08:20 | Sofya Lansere v Riya Bhatia | 6-3,3-6,3-6 |
| WTA - St. Petersburg | 2021/03/13 17:50 | Sofya Lansere v Alina Charaeva | 3-6,0-6 |
| ITF - W25 Kazan | 2021/03/11 09:30 | Valentini Grammatikopoulou v Sofya Lansere | 7-5,6-1 |
| ITF - W25 Kazan | 2021/03/10 10:00 | Elena Malygina v Sofya Lansere | 3-6,7-5,5-7 |
| ITF - W25 Moscova | 2021/02/24 14:45 | Sofya Lansere v Berfu Cengiz | 6-7,3-6 |
| ITF W25 Altenkirchen | 2021/02/14 11:00 | Sofya Lansere v Noma Noha Akugue | 2-6,4-6 |
| ITF - W25 Fujairah | 2021/01/18 05:30 | Eva Guerrero Alvarez v Sofya Lansere | 6-4,6-3 |
| ITF - W25 Hamburg | 2021/01/13 12:25 | Linda Fruhvirtova v Sofya Lansere | 6-2,6-3 |
| ITF - W25 Cordoba | 2021/04/06 15:50 | Irene Burillo Escorihuela v Diana Marcinkevica | 6-4,6-3 |
| ITF - W25 Villa Maria | 2021/03/30 17:55 | Despina Papamichail v Diana Marcinkevica | 1-6,7-6,6-3 |
| ITF - W25 Buenos Aires | 2021/03/24 16:10 | Katharina Gerlach v Diana Marcinkevica | 6-0,6-1 |
| ITF - W15 Manacor | 2021/03/12 09:00 | Leyre Romero Gormaz v Diana Marcinkevica | 7-6,2-6,6-4 |
| ITF - W15 Manacor | 2021/03/11 10:50 | Tereza Mihalikova v Diana Marcinkevica | 2-6,2-6 |
| ITF - W15 Manacor | 2021/03/10 11:10 | Maria G Carrasco v Diana Marcinkevica | 4-6,4-6 |
| ITF - W25 Manacor | 2021/03/03 08:55 | Diana Marcinkevica v Jana Fett | 6-3,3-6,3-6 |
| ITF - W25 Poitiers | 2021/02/23 14:30 | Clara Burel v Diana Marcinkevica | 6-4,6-2 |