Chul Hee Lee defeated Yaoki Ishii 7-6 6-2 in the Indonesia F1 round of 32 on hard. The upset overturned the form book — Yaoki Ishii came in leading the head-to-head 1–0. Chul Hee Lee claimed a first win over Yaoki Ishii in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-17 | Japan F2 | R32 | carpet | Yaoki Ishii | 6-3 6-3 |