Stadium: Court 9 Round: 44 Ground: Hardcourt outdoor
| ITF W15 Antalya | 2021/05/24 10:00 | Emma Kette v Ai Yamaguchi | 3-6,6-3,10-5 |
| ITF W15 Antalya | 2021/05/17 07:00 | Ilay Yoruk v Ai Yamaguchi | 6-2,6-3 |
| ITF W15 Antalya | 2021/05/16 07:00 | Selina Atay v Ai Yamaguchi | 6-3,3-6,7-10 |
| ITF W15 Antalya | 2021/05/09 07:00 | Klara Milicevic v Ai Yamaguchi | 6-2,6-2 |
| ITF W15 Antalya | 2021/05/02 06:00 | Ai Yamaguchi v Julia Lovqvist | 0-6,1-6 |
| ITF W25 Yokohama | 2020/03/03 01:00 | Ai Yamaguchi v Honoka Kobayashi | 0-6,0-6 |
| ITF W15 Hua Hin | 2019/10/09 04:25 | Ai Yamaguchi v Ya-Hsin Lee | 0-6,1-6 |
| ITF W15 Hua Hin | 2019/10/08 04:20 | Haine Ogata v Ai Yamaguchi | 3-6,6-7 |