Sophia Mulsap defeated Nungnadda Wannasuk 7-5 1-6 6-4 in the Balikpapan 10K round of 16 on hard. The upset overturned the form book — Nungnadda Wannasuk came in leading the head-to-head 2–0. Sophia Mulsap claimed a first win over Nungnadda Wannasuk in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-08-17 | Nonthaburi 10K | R16 | hard | Nungnadda Wannasuk | 6-1 6-3 |
| 2006-07-17 | Bangkok 10K | R32 | hard | Nungnadda Wannasuk | 2-6 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.