Chieh Yu Hsu defeated Vivian Segnini 6-4 6-3 in the Santiago 25K round of 32 on clay. The result followed the form book — Chieh Yu Hsu came in leading the head-to-head 1–0. Chieh Yu Hsu extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-12-14 | Veracruz 10K | F | hard | Chieh Yu Hsu | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.