Round: 25 Ground: Hardcourt outdoor
| ITF - W25 Jackson | 2019/04/02 15:00 | Ayumi Koshiishi v Alesya Yakubovich | 6-3,6-2 |
| ITF - W25 Canberra | 2019/03/25 00:00 | Ayumi Koshiishi v Yuuki Tanaka | 3-6,1-6 |
| ITF W15 Xiamen | 2019/03/22 03:35 | Ayumi Koshiishi v Eudice Chong | 2-6,3-6 |
| ITF W15 Xiamen | 2019/03/20 02:00 | Ayumi Koshiishi v Ashmitha Easwaramurthi | 6-0,6-1 |
| ITF - W15 Šimkent | 2019/02/21 08:20 | Ayumi Koshiishi v Anastasia Zakharova | 4-6,4-6 |
| ITF - W15 Šimkent | 2019/02/20 05:00 | Ayumi Koshiishi v Anastasia Astakhova | 6-2,6-4 |
| ITF - W15 Šimkent | 2019/02/13 10:55 | Sadafmoh Tolibova v Ayumi Koshiishi | 4-6,6-1,6-1 |
| ITF - W15 Palmanova | 2019/02/07 09:30 | Daniella Medvedeva v Ayumi Koshiishi | 6-3,6-1 |
| ITF - W25 Rancho Santa Fe | 2019/02/23 20:10 | Ann Li v Nicole Gibbs | 6-3,3-6,4-6 |
| ITF - W25 Rancho Santa Fe | 2019/02/22 23:45 | Ann Li v Claire Liu | 6-4,7-6 |
| ITF - W25 Rancho Santa Fe | 2019/02/22 19:50 | Sesil Karatantcheva v Ann Li | 3-6,5-7 |
| ITF - W25 Rancho Santa Fe | 2019/02/20 20:20 | Paula Cristina Goncalves v Ann Li | 2-6,3-6 |
| ITF W25 Surprise | 2019/02/15 23:00 | Cori Gauff v Ann Li | 6-4,7-5 |
| ITF W25 Surprise | 2019/02/15 19:45 | Pamela Montez v Ann Li | 2-6,6-7 |
| ITF W25 Surprise | 2019/02/12 18:30 | Olivia Rogowska v Ann Li | 4-6,2-6 |
| ITF - W100 Midland | 2019/01/31 19:00 | Yanina Wickmayer v Ann Li | 4-6,6-3,6-2 |