| ITF - W60 Montreux | 09/05 08:30 | 26 | [323] Simona Waltert v Diana Marcinkevica [205] | 4-6,7-6,6-1 | |
| ITF - W60 Montreux | 09/04 14:30 | 25 | Verena Meliss v Diana Marcinkevica | 2-6,6-2,3-6 | |
| ITF - W25 Verbier | 09/01 09:00 | 29 | Diana Marcinkevica v Indy De Vroome | 6-3,3-6,6-7 | |
| ITF - W25 Verbier | 08/31 09:00 | 28 | [205] Diana Marcinkevica v Kathinka Von Deichmann [293] | 6-4,6-3 | |
| ITF - W25 Verbier | 08/30 10:30 | 27 | Diana Marcinkevica v Alice Tubello | 3-6,6-1,6-2 | |
| ITF - W25 Verbier | 08/29 08:00 | 26 | [205] Diana Marcinkevica v Daria Lodikova [454] | 6-2,7-6 | |
| ITF - W25 Verbier | 08/28 07:00 | 25 | Diana Marcinkevica v Jenny Duerst | 6-2,6-3 | |
| Open dos EUA - Feminino | 08/19 15:00 | 44 | [204] Diana Marcinkevica v Liudmila Samsonova [133] | 1-6,4-6 | |
| ITF - W25 Woking | 07/31 14:10 | 25 | Silvia Njiric v Diana Marcinkevica | 6-3,6-3 | |
| WTA - Jurmala | 07/25 12:00 | 26 | [223] Diana Marcinkevica v Anastasia Potapova [64] | 1-6,6-4,2-6 | |
| WTA - Jurmala | 07/22 14:40 | 25 | [310] Kamilla Rakhimova v Diana Marcinkevica [223] | 4-6,3-6 | |
| WTA - Lausana | 07/13 12:05 | 45 | [221] Diana Marcinkevica v Paula Ormaechea [183] | 4-6,7-5,5-7 | |
| ITF - W100 Contrexéville | 07/10 14:35 | 25 | [271] Amandine Hesse v Diana Marcinkevica [221] | 6-3,6-4 | |
| ITF - W25 Corroios - Seixal | 07/05 11:00 | 27 | Diana Marcinkevica v Julia Payola | 6-2,3-6,1-6 | |
| ITF - W25 Corroios - Seixal | 07/04 12:40 | 26 | [221] Diana Marcinkevica v Victoria Rodriguez [404] | 3-6,6-4,6-3 | |
| ITF - W25 Corroios - Seixal | 07/03 11:00 | 25 | Diana Marcinkevica v Marianna Zakarlyuk | 6-2,3-6,6-2 | |
| ITF - W25 Perigueux | 06/28 07:30 | 27 | Diana Marcinkevica v Alice Rame | 6-2,3-6,5-7 | |
| ITF - W25 Perigueux | 06/27 07:00 | 26 | [224] Diana Marcinkevica v Maria Fernanda H Gonzalez [483] | 6-1,3-6,6-4 | |
| ITF - W25 Perigueux | 06/26 07:00 | 25 | Diana Marcinkevica v Kelia Le Bihan | 6-3,4-6,6-3 | |
| ITF - W25 Figueira da Foz | 06/21 11:00 | 27 | [221] Diana Marcinkevica v Ulrikke Eikeri [300] | 0-6,6-2,0-6 | |
| ITF - W25 Figueira da Foz | 06/20 10:00 | 26 | Diana Marcinkevica v Francisca Jorge | 7-6,5-7,6-3 | |
| ITF - W25 Figueira da Foz | 06/18 10:00 | 25 | Diana Marcinkevica v Ines Murta | 6-2,6-0 | |
| ITF - W25 Prerov | 06/13 08:30 | 26 | [228] Diana Marcinkevica v Gabriela Talaba [330] | 1-6,4-6 | |
| ITF - W25 Prerov | 06/12 11:15 | 25 | Diana Marcinkevica v Gabriela Pantuckova | 6-4,6-1 | |
| ITF - W60 Brescia | 06/09 14:00 | 29 | [210] Jasmine Paolini v Diana Marcinkevica [268] | 6-2,6-1 | |
| ITF - W60 Brescia | 06/08 14:00 | 28 | [322] Deborah Chiesa v Diana Marcinkevica [268] | 7-6,6-7,6-7 | |
| ITF - W60 Brescia | 06/07 10:00 | 27 | [268] Diana Marcinkevica v Zoe Hives [197] | 3-6,6-2,7-6 | |
| ITF - W60 Brescia | 06/06 09:00 | 26 | Diana Marcinkevica v Dalila Spiteri | 6-4,6-3 | |
| ITF - W60 Brescia | 06/04 12:00 | 25 | [174] Viktoriya Tomova v Diana Marcinkevica [268] | 6-7,6-2,4-6 | |
| ITF - W25 Grado | 05/30 09:00 | 25 | [198] Rebecca Sramkova v Diana Marcinkevica [268] | 6-1,6-1 |