| ITF W25 Ortisei | 11/25 09:30 | 29 | [375] Diana Marcinkevica v Mona Barthel [250] | 2-6,7-6,4-6 | |
| ITF W25 Ortisei | 11/24 13:00 | 28 | [375] Diana Marcinkevica v Anastasia Kulikova [277] | 6-3,7-6 | |
| ITF W25 Ortisei | 11/23 11:00 | 27 | [375] Diana Marcinkevica v Carolina Kuhl [473] | 6-3,6-3 | |
| ITF W25 Ortisei | 11/22 12:05 | 26 | [188] Chloe Paquet v Diana Marcinkevica [375] | 3-6,6-3,5-7 | |
| ITF W25 Ortisei | 11/21 19:05 | 25 | Diana Marcinkevica v Laura Mair | 7-6,6-2 | |
| ITF W25 Solarino | 11/16 08:00 | 26 | Samira De Stefano v Diana Marcinkevica | 6-1,1-6,6-3 | |
| ITF W25 Solarino | 11/15 12:40 | 25 | Denise Valente v Diana Marcinkevica | 3-6,3-6 | |
| ITF W25 Solarino | 11/01 10:00 | 25 | Samira De Stefano v Diana Marcinkevica | 7-5,6-1 | |
| ITF W25 Loule | 10/27 16:00 | 27 | [264] Silvia Ambrosio v Diana Marcinkevica [372] | 6-1,4-6,6-0 | |
| ITF W25 Loule | 10/27 10:30 | 26 | Evialina Laskevich v Diana Marcinkevica | 4-6,6-3,5-7 | |
| ITF W25 Loule | 10/24 13:05 | 25 | Amalia Suciu v Diana Marcinkevica | 3-6,1-6 | |
| ITF W25 Faro | 10/17 12:55 | 25 | Diana Marcinkevica v Evialina Laskevich | 2-6,3-6 | |
| ITF W40 Quinta do Lago | 10/10 10:10 | 25 | [154] Heather Watson v Diana Marcinkevica [368] | 6-4,6-1 | |
| ITF W40 Quinta do Lago | 10/09 10:20 | 54 | [368] Diana Marcinkevica v Matilde Jorge [136] | 1-6,6-2,6-4 | |
| ITF W40 Quinta do Lago | 10/08 12:50 | 54 | Diana Marcinkevica v Lian Tran | 6-2,6-2 | |
| ITF W25 Reims | 10/03 09:00 | 25 | [366] Diana Marcinkevica v Patricia Maria Tig [487] | 2-6,2-6 | |
| ITF W40 Kursumlijska Banja | 09/26 12:00 | 24 | [332] Mia Ristic v Diana Marcinkevica [361] | 7-5,6-0 | |
| ITF W25 Slobozia | 09/21 07:00 | 26 | Valeriia Olianovskaia v Diana Marcinkevica | 6-4,6-2 | |
| ITF W25 Slobozia | 09/19 10:40 | 25 | Diana Marcinkevica v Daria Tudor | 6-2,6-0 | |
| ITF W40 Skopje | 09/12 07:25 | 24 | [366] Diana Marcinkevica v Radka Zelnickova [408] | 2-6,6-4,6-7 | |
| ITF W60 Montreux | 09/04 09:20 | 54 | Diana Marcinkevica v Laura Mair | 6-1,2-6,1-6 | |
| ITF W60 Collonge-Bellerive | 08/30 07:00 | 25 | [428] Diana Marcinkevica v Michaela Bayerlova [455] | 3-6,6-4,6-7 | |
| ITF W25 Verbier | 08/27 09:00 | 29 | [437] Diana Marcinkevica v Conny Perrin [446] | 6-3,6-4 | |
| ITF W25 Verbier | 08/26 09:30 | 28 | [437] Diana Marcinkevica v Leonie Kung [488] | 6-0,6-3 | |
| ITF W25 Verbier | 08/25 10:55 | 27 | Federica Di Sarra v Diana Marcinkevica | 4-6,6-2,4-6 | |
| ITF W25 Verbier | 08/24 08:30 | 26 | Sophie Luescher v Diana Marcinkevica | 2-6,1-6 | |
| ITF W25 Verbier | 08/23 07:30 | 25 | Kamila Kashaeva v Diana Marcinkevica | 2-6,0-6 | |
| ITF W25 Aldershot | 08/18 12:30 | 27 | [423] Diana Marcinkevica v Katy Dunne [373] | 1-6,3-6 | |
| ITF W25 Aldershot | 08/17 09:00 | 26 | Diana Marcinkevica v Andre Lukosiute | 6-4,6-3 | |
| ITF W25 Aldershot | 08/15 10:00 | 25 | [319] Anna Brogan v Diana Marcinkevica [423] | 5-7,6-7 |