| ITF - Figueira da Foz - Feminino | 2018/07/17 14:40 | Ramu Ueda v Maria Joao Koehler | 7-5,6-3 |
| ITF - Setúbal - Feminino | 2018/07/12 09:30 | Sarah Rebecca Sekulic v Maria Joao Koehler | 0-6,7-6,6-3 |
| ITF - Setúbal - Feminino | 2018/07/10 11:20 | Maria Joao Koehler v Marianna Zakarlyuk | 6-2,5-7,6-2 |
| ITF - Guimarães - Feminino | 2018/07/01 13:00 | Maria Joao Koehler v Zeel Desai | 6-1,3-6,6-1 |
| ITF - Guimarães - Feminino | 2018/06/29 10:00 | Theo Gravouil v Maria Joao Koehler | 2-6,2-6 |
| ITF - Guimarães - Feminino | 2018/06/28 10:00 | Karola Patricia Bejenaru v Maria Joao Koehler | 3-6,1-6 |
| ITF - Guimarães - Feminino | 2018/06/27 11:45 | Stephanie Bertschmann v Maria Joao Koehler | 0-6,0-6 |
| ITF - Amarante - Feminino | 2018/06/20 09:00 | Maria Joao Koehler v Olga Helmi | 3-6,2-6 |
| ITF - Don Benito - Feminino | 2018/07/16 12:15 | Nuria Brancaccio v Natsuho Arakawa | 6-1,6-4 |
| ITF - Aschaffenburg - Qualificação | 2018/07/01 08:00 | Nora Niedmers v Natsuho Arakawa | 1-6,6-4,6-3 |
| ITF - Taipé - Feminino | 2017/06/18 01:30 | Robu Kajitani v Natsuho Arakawa | 6-2,6-1 |
| ITF - Gimcheon - Feminino | 2017/06/13 02:30 | Hyojung Yea v Natsuho Arakawa | 6-2,6-3 |
| ITF - Gimcheon - Feminino | 2017/06/12 02:00 | Sol Hee Sim v Natsuho Arakawa | 6-4,3-6,0-6 |
| ITF - Gimcheon - Feminino | 2017/06/11 02:00 | Natsuho Arakawa v Han-Bit Lee | 6-4,6-3 |
| ITF - Nashville - Qualificação - Feminino | 2016/11/20 19:30 | Natsuho Arakawa v Christina Rosca | 2-6,6-3,1-6 |