Yaoki Ishii defeated Chul Hee Lee 6-3 6-3 in the Japan F2 round of 32 on carpet. The upset overturned the form book — Chul Hee Lee came in leading the head-to-head 1–0. Yaoki Ishii claimed a first win over Chul Hee Lee in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-07-31 | Indonesia F1 | R32 | hard | Chul Hee Lee | 7-6(4) 6-2 |