Stadium: S Round: 54
| ITF Women Charlottesville | 2018/04/27 17:25 | Mari Osaka v Anhelina Kalinina | 2-6,7-6,5-7 |
| ITF Women Charlottesville | 2018/04/26 21:40 | Madison Brengle v Mari Osaka | 1-6,2-6 |
| ITF Women Charlottesville | 2018/04/26 16:50 | Mari Osaka v Katherine Sebov | 1-6,7-6,6-1 |
| ITF Women Charlottesville Qual | 2018/04/24 14:00 | Mari Osaka v Alexandra Mueller | 6-4,6-2 |
| ITF Women Charlottesville Qual | 2018/04/23 14:00 | Mari Osaka v Ingrid Neel | 6-7,6-1,6-1 |
| ITF Women Pelham | 2018/04/10 23:30 | Mari Osaka v Barbara Haas | 6-4,6-7,0-6 |
| ITF Women Jackson | 2018/04/04 15:00 | Mari Osaka v Gaia Sanesi | 5-7,4-6 |
| ITF Women Wesley Chapel Qual | 2018/01/23 19:40 | Mari Osaka v Olga Ianchuk | 6-7,4-6 |
| ITF Women Charlottesville Qual | 2018/04/22 15:55 | Iga Swiatek v Paula Cristina Goncalves | 6-4,6-2 |
| ITF Women Dothan Qual | 2018/04/16 16:40 | Ellie Douglas v Paula Cristina Goncalves | 6-1,6-1 |
| ITF Women Dothan Qual | 2018/04/15 22:30 | Paula Cristina Goncalves v Alexa Guarachi | 7-6,7-6 |
| ITF Women Rancho Santa Fe | 2018/02/22 20:00 | Paula Cristina Goncalves v Evgeniya Rodina | 5-7,4-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/22 02:20 | Olga Ianchuk v Paula Cristina Goncalves | 6-1,6-7,4-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/20 18:15 | Ann Li v Paula Cristina Goncalves | 7-6,0-6,4-6 |
| ITF Women Rancho Santa Fe Qual | 2018/02/19 17:30 | Paula Cristina Goncalves v Hanna Chang | 6-3,4-6,6-4 |
| ITF Women Rancho Santa Fe Qual | 2018/02/18 17:30 | Paula Cristina Goncalves v Yuki Kristina Chiang | 6-1,6-1 |