Aleksandrina Naydenova defeated Patcharin Cheapchadej 6-4 7-6 in the W25 Hua Hin round of 32 on hard. The upset overturned the form book — Patcharin Cheapchadej came in leading the head-to-head 1–0. Aleksandrina Naydenova claimed a first win over Patcharin Cheapchadej in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-11-13 | W25 Hua Hin | R32 | hard | Patcharin Cheapchadej | 6-3 6-3 |