Guilherme Ochiai defeated Yaoki Ishii 7-6 6-1 in the Japan F7 round of 32 on clay. The upset overturned the form book — Yaoki Ishii came in leading the head-to-head 3–1. Guilherme Ochiai narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-09-11 | Japan F9 | R32 | carpet | Guilherme Ochiai | 6-1 6-4 |
| 2006-06-19 | Japan F7 | R16 | carpet | Yaoki Ishii | 2-6 6-2 7-6(2) |
| 2006-04-17 | Japan F2 | QF | carpet | Yaoki Ishii | 6-1 6-1 |
| 2004-08-30 | Japan F6 | R16 | hard | Yaoki Ishii | 6-1 7-5 |