| ITF W35 Nottingham | 04/25 11:30 | 26 | Julie Belgraver v Diana Marcinkevica | 6-1,3-6,6-3 | |
| ITF W35 Nottingham | 04/24 10:45 | 25 | Jaquelyn Ogunwale v Diana Marcinkevica | 3-6,6-7 | |
| ITF W75 Chiasso | 04/17 09:55 | 25 | [318] Diana Marcinkevica v Leonie Kung [311] | 6-2,4-6,4-6 | |
| ITF W35 Bujumbura | 04/11 08:00 | 26 | [258] Jasmijn Gimbrere v Diana Marcinkevica [318] | 3-6,6-2,7-6 | |
| ITF W35 Bujumbura | 04/09 08:00 | 25 | Beverley Nyangon v Diana Marcinkevica | 5-7,4-6 | |
| ITF W35 Bujumbura | 04/02 08:00 | 25 | Anna Hertel v Diana Marcinkevica | 6-3,1-6,6-4 | |
| ITF W75 Croissy-Beaubourg | 03/26 12:45 | 25 | [164] Yuriko Lily Miyazaki v Diana Marcinkevica [314] | 5-7,7-6,6-3 | |
| ITF W75 Croissy-Beaubourg | 03/25 13:55 | 54 | [314] Diana Marcinkevica v Lucie Nguyen Tan [452] | 6-4,6-3 | |
| ITF W75 Croissy-Beaubourg | 03/24 14:40 | 54 | Diana Marcinkevica v Bojana Marinkovic | 6-3,3-6,6-3 | |
| ITF W35 Indore | 03/14 04:00 | 26 | [316] Diana Marcinkevica v Jacqueline Cabaj Awad [457] | 6-7,2-6 | |
| ITF W35 Indore | 03/13 04:00 | 25 | Diana Marcinkevica v Rinon Okuwaki | 6-2,2-6,6-2 | |
| ITF W35 Nagpur | 03/06 04:30 | 25 | Ayumi Koshiishi v Diana Marcinkevica | 6-4,7-6 | |
| ITF W35 Gurugram | 02/28 05:35 | 25 | Rinon Okuwaki v Diana Marcinkevica | 7-5,6-4 | |
| WTA Mumbai | 02/03 11:05 | 14 | [477] Peangtarn Plipuech v Diana Marcinkevica [307] | 6-2,6-0 | |
| ITF W50 Indore | 02/01 04:30 | 26 | [425] Eri Shimizu v Diana Marcinkevica [307] | 7-6,6-1 | |
| ITF W50 Indore | 01/31 07:20 | 25 | [307] Diana Marcinkevica v Sapfo Sakellaridi [279] | 6-7,6-1,6-4 | |
| ITF W50 Pune | 01/23 04:30 | 25 | [171] Moyuka Uchijima v Diana Marcinkevica [307] | 3-6,6-2,6-3 | |
| ITF W50 Bengaluru | 01/15 08:00 | 54 | Diana Marcinkevica v Mei Yamaguchi | 6-1,2-6,2-6 | |
| ITF W50 Bengaluru | 01/14 05:30 | 54 | Diana Marcinkevica v Lakshmi Gowda | 6-2,6-1 | |
| ITF W50 Nonthaburi | 01/10 03:00 | 25 | [307] Diana Marcinkevica v Mananchaya Sawangkaew [266] | 3-6,2-6 | |
| ITF W50 Nonthaburi | 01/02 03:00 | 25 | [309] Diana Marcinkevica v Antonia Ruzic [244] | 0-6,3-6 | |
| ITF W40 Navi Mumbai | 12/30 05:30 | 28 | Ekaterina Makarova v Diana Marcinkevica | 6-3,3-6,6-2 | |
| ITF W40 Navi Mumbai | 12/29 05:25 | 27 | Daria Kudashova v Diana Marcinkevica | 1-6,5-7 | |
| ITF W40 Navi Mumbai | 12/28 07:10 | 26 | [495] Funa Kozaki v Diana Marcinkevica [346] | 4-6,5-7 | |
| ITF W40 Navi Mumbai | 12/27 05:25 | 25 | Arunkumar Lakshmi Prabha v Diana Marcinkevica | 3-6,2-6 | |
| ITF W25 Solapur | 12/23 06:45 | 28 | Diana Marcinkevica v Ekaterina Vl. Makarova | 4-6,2-6 | |
| ITF W25 Solapur | 12/22 04:30 | 27 | [345] Diana Marcinkevica v Sapfo Sakellaridi [282] | 6-4,6-3 | |
| ITF W25 Solapur | 12/21 04:30 | 26 | [345] Diana Marcinkevica v Ekaterina Kazionova [501] | 6-3,7-6 | |
| ITF W25 Solapur | 12/20 04:25 | 25 | Diana Marcinkevica v Honoka Kobayashi | 6-2,2-6,6-4 | |
| ITF W25 Ortisei | 11/25 09:30 | 29 | [375] Diana Marcinkevica v Mona Barthel [250] | 2-6,7-6,4-6 |