Yaoki Ishii defeated Chu Huan Yi 6-2 6-4 in the Japan F1 round of 32 on carpet. The upset overturned the form book — Chu Huan Yi came in leading the head-to-head 2–0. Yaoki Ishii claimed a first win over Chu Huan Yi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-10-13 | Japan F10 | R32 | hard | Chu Huan Yi | 6-3 6-3 |
| 2008-06-16 | Japan F5 | R32 | carpet | Chu Huan Yi | 6-3 3-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.