| Billie Jean King Cup | 04/13 07:00 | 1 | [395] Diana Marcinkevica v Natalia Szabanin [249] | 1-6,6-7 | |
| Billie Jean King Cup | 04/12 07:00 | 1 | Diana Marcinkevica v Lamis Alhussein Abdel Aziz | 7-6,7-5 | |
| Billie Jean King Cup | 04/10 08:30 | 1 | Diana Marcinkevica v Lexie Stevens | 3-6,5-7 | |
| ITF W25 Jakarta | 03/30 06:15 | 26 | [393] Diana Marcinkevica v Jenny Duerst [337] | 1-6,2-6 | |
| ITF W25 Jakarta | 03/29 04:20 | 25 | [393] Diana Marcinkevica v Beatrice Gumulya [251] | 6-4,4-6,7-5 | |
| ITF W25 Jakarta | 03/22 03:35 | 25 | [393] Diana Marcinkevica v Anastasia Zakharova [214] | 1-6,0-6 | |
| ITF W40 Bengaluru | 03/09 07:40 | 26 | [389] Diana Marcinkevica v Rutuja Bhosale [419] | 6-4,3-6,2-6 | |
| ITF W40 Bengaluru | 03/08 09:15 | 25 | [454] Sahaja Yamalapalli v Diana Marcinkevica [389] | 6-7,3-6 | |
| ITF W25 Bengaluru | 03/01 04:30 | 25 | [418] Rutuja Bhosale v Diana Marcinkevica [388] | 6-3,6-4 | |
| ITF W15 Gurugram | 02/24 04:00 | 27 | Diana Marcinkevica v Zeel Desai | Retired | |
| ITF W15 Gurugram | 02/23 03:50 | 26 | Diana Marcinkevica v Weronika Baszak | 6-3,6-3 | |
| ITF W15 Gurugram | 02/22 03:55 | 25 | Diana Marcinkevica v Sachi Sharma | 6-1,6-1 | |
| ITF W15 Jhajjar | 02/16 04:25 | 26 | Diana Marcinkevica v Sandeepti Singh Rao | 6-7,2-6 | |
| ITF W15 Jhajjar | 02/15 05:25 | 25 | Diana Marcinkevica v Marie Mettraux | 3-6,6-1,6-1 | |
| ITF W40 Pune | 01/24 07:50 | 25 | [374] Diana Marcinkevica v Nigina Abduraimova [176] | 2-6,0-6 | |
| ITF W40 Bhopal | 01/18 04:00 | 25 | Diana Marcinkevica v Ksenia Zaytseva | 1-6,6-7 | |
| ITF W25 Navi Mumbai | 12/23 05:20 | 27 | [391] Priska Madelyn Nugroho v Diana Marcinkevica [302] | 5-7,7-5,6-4 | |
| ITF W25 Navi Mumbai | 12/22 06:25 | 26 | [429] Katarina Kozarov v Diana Marcinkevica [302] | 4-6,6-2,4-6 | |
| ITF W25 Navi Mumbai | 12/20 07:05 | 25 | Sowjanya Bavisetti v Diana Marcinkevica | 4-6,7-6,1-6 | |
| ITF W25 Solapur | 12/13 04:00 | 25 | [492] Daria Kudashova v Diana Marcinkevica [302] | 6-2,7-5 | |
| ITF W25 Selva Gardena | 11/30 09:30 | 26 | Diana Marcinkevica v Daria Lopatetska | 3-6,4-6 | |
| ITF W25 Selva Gardena | 11/29 11:00 | 25 | [309] Sapfo Sakellaridi v Diana Marcinkevica [299] | 5-7,7-5,2-6 | |
| ITF W25 Selva Gardena | 11/28 08:00 | 54 | Diana Marcinkevica v Caterina Odorizzi | 6-2,6-3 | |
| ITF W25 Ortisei | 11/24 11:00 | 27 | [298] Diana Marcinkevica v Katarzyna Kawa [278] | 4-6,3-6 | |
| ITF W25 Ortisei | 11/23 11:10 | 26 | Diana Marcinkevica v Arianna Zucchini | 6-2,6-2 | |
| ITF W25 Ortisei | 11/22 13:10 | 25 | Diana Marcinkevica v Camilla Gennaro | 4-6,6-4,6-4 | |
| ITF W60 Bratislava | 11/17 13:00 | 26 | [137] Ana Konjuh v Diana Marcinkevica [301] | 6-3,6-2 | |
| ITF W60 Bratislava | 11/16 09:30 | 25 | [301] Diana Marcinkevica v Berfu Cengiz [361] | Retired | |
| Billie Jean King Cup | 11/12 11:40 | 64 | [492] Tamira Paszek v Diana Marcinkevica [300] | 6-2,6-3 | |
| ITF W100 Shrewsbury | 10/31 14:15 | 54 | [300] Diana Marcinkevica v Eliz Maloney [500] | 1-6,4-6 |