Lorraine M Guillermo defeated Charlotte Chavatipon 6-3 6-7 6-4 in the W15 Norman 1 round of 16 on hard. The upset overturned the form book — Charlotte Chavatipon came in leading the head-to-head 1–0. Lorraine M Guillermo claimed a first win over Charlotte Chavatipon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-03-03 | W25 Las Vegas | Q32 | hard | Charlotte Chavatipon | 0-6 6-3 10-4 |