Stadium: CTA 1 Round: 25
| ITF Women Obidos | 2018/06/14 13:55 | Maria Joao Koehler v Lulu Sun | 0-6,3-6 |
| ITF Women Obidos | 2018/06/13 14:45 | Olga Parres Azcoitia v Maria Joao Koehler | 0-6,4-6 |
| ITF Women Obidos | 2018/06/06 12:05 | Laura Ioana Paar v Maria Joao Koehler | 6-2,6-1 |
| ITF Women Obidos | 2018/05/30 09:30 | Francisca Jorge v Maria Joao Koehler | 2-6,7-6,6-1 |
| ITF Women Oeiras | 2018/05/25 12:00 | Maria Joao Koehler v Gabriella Da Silva Fick | 4-6,6-3,1-6 |
| ITF Women Oeiras | 2018/05/24 18:25 | Alicia Herrero Linana v Maria Joao Koehler | 4-6,1-6 |
| ITF Women Oeiras | 2018/05/23 12:40 | Maria Joao Koehler v Mallaurie Noel | 6-2,4-6,6-3 |
| ITF Women Obidos | 2018/04/25 12:25 | Maria Ines Fonte v Maria Joao Koehler | 1-6,6-4,4-6 |
| ITF Women Amarante | 2018/06/18 09:00 | Olga Helmi v Jane Stewart | 6-1,6-1 |
| ITF Women Amarante | 2018/06/17 09:00 | Olga Helmi v Iman Garshong | 6-0,6-1 |
| ITF Women Hammamet | 2018/05/23 09:00 | Miriana Tona v Olga Helmi | 6-1,6-0 |
| ITF Women Karlskrona | 2018/05/10 09:50 | Lisa Matviyenko v Olga Helmi | 6-1,6-1 |
| ITF Women Karlskrona | 2018/05/09 14:30 | Anette Munozova v Olga Helmi | 7-6,3-6,6-7 |
| ITF Women Sharm El Sheikh | 2018/04/01 08:00 | Rio Kitagawa v Olga Helmi | 3-6,3-6 |
| ITF Women Sharm El Sheikh | 2018/03/29 11:15 | Nastja Kolar v Olga Helmi | 6-2,6-0 |
| ITF Women Sharm El Sheikh | 2018/03/27 09:25 | Varvara Kuznetsova v Olga Helmi | 3-6,2-6 |