Estádio: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF - W15 Sozopol | 2021/09/14 10:00 | Katarina Kuzmova v Maria Krupenina | 6-4,6-3 |
| ITF - W25 Almaty | 2021/08/24 06:50 | Maria Krupenina v Alisa Kummel | 1-6,6-4,2-10 |
| ITF - W15 Moscovo | 2021/07/22 07:00 | Maria Krupenina v Eva Garkusha | 0-6,1-6 |
| ITF - W60 Nur-Sultã | 2021/07/13 08:50 | Angelina Gabueva v Maria Krupenina | 7-5,6-4 |
| ITF - W60 Nur-Sultã | 2021/07/12 08:10 | Elizaveta Gnilozubova v Maria Krupenina | 1-6,2-6 |
| ITF - W25 Kazan | 2021/06/01 10:10 | Maria Krupenina v Anna Ureke | 1-6,3-6 |
| ITF - W25 Kazan | 2021/05/31 11:05 | Maria Krupenina v Arina Solomatina | 6-1,6-0 |
| ITF - W15 Tbilisi | 2021/05/18 05:30 | Shelly Bereznyak v Maria Krupenina | 6-1,6-3 |