Stadium: Court 1 Round: 28
| ITF Women Karlskrona | 2018/05/11 09:20 | Matvienko, Lisa v van Nguyen, Chanelle | 7-6,6-7,6-3 |
| ITF Women Karlskrona | 2018/05/10 09:50 | Matvienko, Lisa v Olga Helmi | 6-1,6-1 |
| ITF Women Karlskrona | 2018/05/09 12:40 | Matvienko, Lisa v Raveena Kingsley | 7-6,6-4 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/26 12:00 | Anastasia Grymalska v Matvienko, Lisa | 7-6,6-3 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/24 12:00 | Matvienko, Lisa v Elysia Bolton | 7-5,6-1 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/19 12:00 | Martina Trevisan v Matvienko, Lisa | 6-3,3-6,6-2 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/04/18 12:00 | Matvienko, Lisa v Naiktha Bains | 3-6,6-2,6-3 |
| ITF Women Santa Margherita Qual | 2018/04/16 14:40 | Matvienko, Lisa v Tiffany William | 6-2,6-3 |
| ITF Women Karlskrona | 2018/05/11 08:00 | Mirjam Bjorklund v Barritza, Karen | 5-7,5-7 |
| ITF Women Karlskrona | 2018/05/10 11:25 | Vehvilainen, Liisa v Barritza, Karen | 1-6,1-6 |
| ITF Women Karlskrona | 2018/05/09 11:00 | Yudanov, Marina v Barritza, Karen | 6-2,6-7,3-6 |
| ITF Women Wiesbaden | 2018/04/25 15:10 | Barritza, Karen v Dejana Radanovic | 3-6,3-6 |
| ITF Women Wiesbaden Qual | 2018/04/24 09:50 | Barritza, Karen v Sumova, Diana | 6-3,6-3 |
| Fed Cup, Groupe Mondial | 2018/04/21 09:35 | Barritza, Karen v Glushko, Julia | 6-1,5-7,1-6 |
| Fed Cup, Groupe Mondial | 2018/04/20 10:50 | Barritza, Karen v Maria Sakkari | 0-6,3-6 |
| Fed Cup, Groupe Mondial | 2018/04/18 09:25 | Barritza, Karen v Sandra Samir | 7-5,4-6,6-2 |