Chu Huan Yi defeated Yaoki Ishii 6-3 3-6 6-3 in the Japan F5 round of 32 on carpet. Chu Huan Yi extended 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 |
| 2005-04-11 | Japan F1 | R32 | carpet | Yaoki Ishii | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.