Hiroyasu Sato defeated Norikazu Sugiyama 6-4 6-4 in the Japan F6 round of 32 on carpet. The upset overturned the form book — Norikazu Sugiyama came in leading the head-to-head 1–0. Hiroyasu Sato claimed a first win over Norikazu Sugiyama in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-06-12 | Japan F6 | R32 | clay | Norikazu Sugiyama | 6-1 6-4 |