| UTR Pro Tennis Series Francia femminili | 06/26 11:30 | - | [258] Diana Marcinkevica v Amanda Carreras [330] | 3-6,1-6 | |
| European Pro Tennis Series femminili | 06/25 08:35 | - | Diana Marcinkevica v Marie Temin | 6-3,5-1 | |
| European Pro Tennis Series femminili | 06/24 07:00 | - | [258] Diana Marcinkevica v Yvonne Cavalle-Reimers [440] | 6-4,5-1 | |
| European Pro Tennis Series femminili | 06/23 12:30 | - | [258] Diana Marcinkevica v Verena Meliss [489] | 4-6,6-3,0-0 | |
| WTA Lione | 02/29 16:20 | 45 | [265] Diana Marcinkevica v Isabella Shinikova [184] | 3-6,4-6 | |
| ITF W25 Macon | 02/28 16:20 | 27 | [265] Diana Marcinkevica v Vera Lapko [378] | 3-6,3-6 | |
| ITF W25 Macon | 02/27 09:00 | 26 | [385] Miriam B Bulgaru v Diana Marcinkevica [265] | 7-6,2-6,2-6 | |
| ITF W25 Macon | 02/25 11:45 | 25 | Lamis Alhussein Abdel Aziz v Diana Marcinkevica | 2-6,7-5,2-6 | |
| ITF W100 Nicholasville | 02/10 17:00 | 54 | [262] Diana Marcinkevica v Yuxuan Zhang [433] | 3-6,6-3,8-10 | |
| WTA Newport Beach | 01/27 22:15 | 24 | [188] Jessika Ponchet v Diana Marcinkevica [263] | 6-3,6-2 | |
| ITF W25 Navi Mumbai | 12/19 09:30 | 26 | [374] Amina Anshba v Diana Marcinkevica [242] | 6-1,6-2 | |
| ITF W25 Navi Mumbai | 12/18 09:30 | 25 | Nefisa Berberovic v Diana Marcinkevica | 7-6,3-6,3-6 | |
| ITF W25 Pune | 12/12 08:15 | 26 | [441] Olga Doroshina v Diana Marcinkevica [251] | 4-6,7-6,6-2 | |
| ITF W25 Pune | 12/10 05:00 | 25 | Anna Morgina v Diana Marcinkevica | 2-6,3-6 | |
| ITF W25 Solapur | 12/07 05:00 | 28 | [250] Diana Marcinkevica v Naiktha Bains [249] | 4-6,2-6 | |
| ITF W25 Solapur | 12/06 07:55 | 27 | [187] Valeria Savinykh v Diana Marcinkevica [250] | 4-6,3-6 | |
| ITF W25 Solapur | 12/05 04:00 | 26 | [411] Daria Mishina v Diana Marcinkevica [250] | 3-6,4-6 | |
| ITF W25 Solapur | 12/03 04:00 | 25 | Vlada Katic v Diana Marcinkevica | 6-3,3-6,1-6 | |
| ITF W25 Bhopal | 11/21 04:30 | 26 | Gergana Topalova v Diana Marcinkevica | 6-3,4-6,6-3 | |
| ITF W25 Bhopal | 11/19 04:00 | 25 | Rashi Malviya v Diana Marcinkevica | 0-6,2-6 | |
| ITF W25 Gwalior | 11/14 04:15 | 26 | Sowjanya Bavisetti v Diana Marcinkevica | 6-4,6-3 | |
| ITF W25 Gwalior | 11/13 05:40 | 25 | Mahak Jain v Diana Marcinkevica | 2-6,3-6 | |
| ITF W25 Hua Hin | 11/06 04:15 | 25 | Mananchaya Sawangkaew v Diana Marcinkevica | 6-3,1-6,6-2 | |
| ITF W60 Nantes | 10/30 10:00 | 25 | [207] Diana Marcinkevica v Vitalia Diatchenko [120] | 2-6,2-6 | |
| ITF W80 Poitiers | 10/24 11:30 | 26 | [207] Diana Marcinkevica v Tereza Martincova [131] | 1-6,6-7 | |
| ITF W80 Poitiers | 10/23 08:00 | 25 | [480] Angelica Moratelli v Diana Marcinkevica [207] | 6-4,2-6,4-6 | |
| WTA Lussemburgo | 10/12 10:00 | 45 | [213] Diana Marcinkevica v Bibiane Schoofs [150] | 6-7,5-7 | |
| ITF W25 Cherbourg | 10/09 10:00 | 25 | Mallaurie Noel v Diana Marcinkevica | 6-3,6-2 | |
| ITF W60 Caldas da Rainha | 09/24 14:00 | 25 | [213] Isabella Shinikova v Diana Marcinkevica [211] | 6-4,6-7,6-4 | |
| ITF W60 Saint-Malo | 09/18 14:30 | 25 | [161] Giulia Gatto Monticone v Diana Marcinkevica [196] | 3-6,7-5,7-5 |