Stadium: Court Central Round: 44
| ITF Women Porto Qual | 2018/07/22 12:00 | Koehler, Maria Joao v Natsuho Arakawa | 6-4,6-0 |
| ITF Women Figueira Da Foz | 2018/07/17 14:40 | Ueda, Ramu v Koehler, Maria Joao | 7-5,6-3 |
| ITF Women Setubal | 2018/07/12 09:30 | Sarah Rebecca Sekulic v Koehler, Maria Joao | 0-6,7-6,6-3 |
| ITF Women Setubal | 2018/07/10 11:20 | Koehler, Maria Joao v Zakarlyuk, Marianna | 6-2,5-7,6-2 |
| ITF Women Guimaraes | 2018/07/01 13:00 | Koehler, Maria Joao v Zeel Desai | 6-1,3-6,6-1 |
| ITF Women Guimaraes | 2018/06/29 10:00 | Gravouil, Theo v Koehler, Maria Joao | 2-6,2-6 |
| ITF Women Guimaraes | 2018/06/28 10:00 | Karola Patricia Bejenaru v Koehler, Maria Joao | 3-6,1-6 |
| ITF Women Guimaraes | 2018/06/27 11:45 | Bertschmann, Stephanie v Koehler, Maria Joao | 0-6,0-6 |
| ITF Women Porto Qual | 2018/07/22 12:00 | Schoen, Annabel v Verena Meliss | 1-6,3-6 |
| ITF Women Getxo | 2018/07/13 16:30 | Andrea Gamiz v Verena Meliss | 7-6,7-6 |
| ITF Women Getxo | 2018/07/12 10:00 | Baranano, Paula v Verena Meliss | 4-6,2-6 |
| ITF Women Getxo | 2018/07/09 08:00 | Verena Meliss v Ana Sofia Sanchez | 7-6,6-3 |
| ITF Women Getxo Qual | 2018/07/08 13:35 | Verena Meliss v Lazareva, Margarita | 7-5,6-2 |
| ITF Women Getxo Qual | 2018/07/07 08:00 | Verena Meliss v de Lucas Perez, Yesica | 6-1,6-1 |
| ITF Women Sassuolo | 2018/06/20 10:05 | Angelica Moratelli v Verena Meliss | 7-5,6-3 |
| ITF Women Sassuolo | 2018/06/19 10:20 | Ivaldi, Benedetta v Verena Meliss | 0-6,1-6 |