Ai Yamamoto defeated Varatchaya Wongteanchai 6-3 6-0 in the Khonkan 10K round of 16 on hard. The result followed the form book — Ai Yamamoto came in leading the head-to-head 2–1. Ai Yamamoto extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-02-14 | Aurangabad 10K | QF | clay | Varatchaya Wongteanchai | 6-1 6-0 |
| 2009-06-22 | Bangkok 10K | F | hard | Ai Yamamoto | 6-1 6-1 |
| 2008-05-12 | Bangkok 10K | R32 | hard | Ai Yamamoto | 7-5 2-6 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.