Stadium: Court 1 Round: 26 Ground: Synthetic outdoor
| Obidos, Singles W-WITF-POR-12A | 2018/04/25 09:00 | Arina Rodionova v Guerrero Alvarez, Eva | 6-2,7-5 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/19 11:15 | Arina Rodionova v Katie Swan | 6-2,3-6,3-6 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/18 12:25 | Arina Rodionova v Sarah Beth Grey | 7-6,4-6,6-4 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/14 12:00 | Arina Rodionova v Jorovic, Ivana | 7-5,5-7,1-6 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/13 17:30 | Arina Rodionova v Rubini, Stefania | 6-1,7-5 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/11 13:30 | Arina Rodionova v Lumsden, Maia | 6-2,6-2 |
| WTA Charleston Qual | 2018/03/31 15:45 | Arina Rodionova v Sophie Chang | 6-4,6-7,6-7 |
| WTA Miami Qual | 2018/03/19 19:30 | Arina Rodionova v Viktorija Golubic | 3-6,3-6 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/25 12:25 | Fonte, Maria Ines v Koehler, Maria Joao | 1-6,6-4,4-6 |
| ITF Women Obidos Qual | 2018/04/24 09:30 | Koehler, Maria Joao v Lulu Sun | 6-1,6-4 |
| ITF Women Obidos Qual | 2018/04/22 11:30 | Koehler, Maria Joao v Quiterio, Lucia | 7-5,4-6,6-0 |
| Obidos, Singles W-WITF-POR-12A | 2018/04/18 14:00 | Koehler, Maria Joao v Saez Larra, Olga | 4-6,1-6 |
| ITF Women Obidos Qual | 2018/04/09 09:00 | Koehler, Maria Joao v Hatouka, Yuliya | 4-6,4-6 |
| ITF Women Hammamet | 2018/03/29 13:40 | Gonzalez, Montserrat v Koehler, Maria Joao | 6-3,7-6 |
| ITF Women Hammamet | 2018/03/28 08:30 | Nefisa Berberovic v Koehler, Maria Joao | 2-6,3-6 |
| ITF Women Hammamet | 2018/03/26 13:30 | Koehler, Maria Joao v Bataille, Esther | 6-1,6-3 |