Young Ja Choi defeated Suchanun Viratprasert 7-6 6-3 in the Nonthabuiri 10K semi-final on hard. The upset overturned the form book — Suchanun Viratprasert came in leading the head-to-head 2–0, but Young Ja Choi had been the form player, winning 2 of their last 7 on hard. Young Ja Choi claimed a first win over Suchanun Viratprasert in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-08-04 | Nonthaburi 10K | QF | hard | Suchanun Viratprasert | 6-1 6-4 |
| 2003-06-02 | Seoul 25K | R16 | hard | Suchanun Viratprasert | 6-0 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.