Stadium: Court 10 Round: 25
| ITF Women Taipei | 2018/07/23 03:00 | Kitagawa, Rio v Chang, Ting-Pei | 6-2,4-6,4-6 |
| ITF Women Jakarta | 2018/07/17 07:00 | 쿨람바예바, 지베크 v Kitagawa, Rio | 6-2,6-1 |
| ITF Women Solo | 2018/07/10 06:00 | Du, Zhima v Kitagawa, Rio | 6-3,6-2 |
| ITF Women Daegu Qual | 2018/06/19 01:00 | 오쿠노, 아야카 v Kitagawa, Rio | 6-0,7-6 |
| ITF Women Daegu Qual | 2018/06/18 01:00 | Bizhukova, Fatima v Kitagawa, Rio | 2-6,0-6 |
| ITF Women Gyeongsan | 2018/06/12 02:55 | Kitagawa, Rio v 오쿠노, 아야카 | 2-6,4-6 |
| ITF Women Sangju | 2018/06/05 01:00 | Kitagawa, Rio v 정, 수남 | 0-6,3-6 |
| ITF Women Karuizawa Qual | 2018/05/20 02:30 | 사이고, 리나 v Kitagawa, Rio | 6-2,6-3 |
| ITF Women Gimcheon | 2018/08/12 01:00 | Natarajan, Ramya v Lee, Seunghyun | 6-2,6-2 |
| ITF Women Nonthaburi Qual | 2018/07/07 04:00 | 야마구치, 메이 v Natarajan, Ramya | 4-6,6-1,6-1 |
| ITF Women Hua Hin Qual | 2018/06/04 03:50 | 로우틀리프, 에린 v Natarajan, Ramya | 6-4,6-3 |
| ITF Women Hua Hin Qual | 2018/06/03 03:00 | 브란코비치, 자라 v Natarajan, Ramya | 6-2,3-6,2-6 |
| ITF Women Hua Hin Qual | 2018/05/07 02:30 | Natarajan, Ramya v 초, 이 첸 | 2-6,6-4,1-6 |
| ITF Women Hua Hin Qual | 2018/05/06 02:30 | Natarajan, Ramya v 산, 위 | 6-2,6-1 |
| ITF Women Hua Hin Qual | 2018/04/29 06:00 | Natarajan, Ramya v 허, 지아환 | 6-1,6-4 |
| Pune, Singles Qualifying W-C25-IND-04A | 2017/12/09 07:30 | Natarajan, Ramya v 팔키나, 크세니아 | 3-6,3-6 |