Stadium: Court 12 Round: 27 Ground: Clay
| ITF W15 Hilton Head | 2021/10/07 13:35 | Ngo Gwodog, Eugenie Christine v Marcinkevica, Deniza | 1-6,1-5 |
| ITF W15 Hilton Head | 2021/10/07 13:00 | Ngo Gwodog, Eugenie Christine v Marcinkevica, Deniza | 1-6,1-6 |
| ITF Women Hilton Head | 2021/10/05 20:00 | Ngo Gwodog, Eugenie Christine v Marcinkevica, Deniza | 1-6,0-6 |
| ITF Women Hilton Head | 2021/10/04 19:00 | Meyer, Emily v Marcinkevica, Deniza | 6-3,4-6,3-10 |
| ITF Women Warsaw Qual | 2018/08/04 10:00 | Marcinkevica, Deniza v Eidukonyte, Joana | 3-6,1-6 |
| ITF Women Parnu | 2018/07/17 07:00 | Dmitrieva, Sofia v Marcinkevica, Deniza | 6-1,6-4 |
| Minsk, Singles Qualifying W-WITF-BLR-01A | 2017/11/20 07:00 | Marcinkevica, Deniza v Diana Demidova | 5-7,0-6 |
| Minsk, Singles Qualifying W-WITF-BLR-01A | 2017/11/19 07:00 | Marcinkevica, Deniza v Skachkova, Katsiaryna | 3-6,6-3,6-4 |
| ITF W15 Hilton Head | 2021/10/09 13:00 | Mckenna Schaefbauer v Stewart, Katerina | 0-6,6-4,3-10 |
| ITF W15 Hilton Head | 2021/10/05 19:20 | Lutzeier, Lena v Stewart, Katerina | 1-6,1-6 |
| WTA - Cluj-Napoca | 2021/08/01 14:10 | Stewart, Katerina v Irina Fetecau | 1-6,5-7 |
| ITF W60 Versmold | 2021/07/28 11:00 | Stewart, Katerina v Elina Avanesyan | 6-7,4-6 |
| ITF W60 Biarritz | 2021/07/14 08:00 | Stephanie Wagner v Stewart, Katerina | 6-0,6-1 |
| ITF W60 Amstelveen | 2021/07/05 10:25 | Stewart, Katerina v Alexandra Osborne | 4-6,1-6 |
| ITF W60 Charleston | 2021/06/23 13:30 | Maria Mateas v Stewart, Katerina | 6-4,0-6,7-6 |
| ITF W25 Pelham | 2021/05/19 16:00 | Stewart, Katerina v Contreras Gomez, Fernanda | 1-6,2-6 |