Guilherme Ochiai defeated Yuichi Sugita 7-5 6-2 in the Japan F6 round of 32 on hard. The upset overturned the form book — Yuichi Sugita came in leading the head-to-head 2–0, but Guilherme Ochiai had been the form player, winning 4 of their last 8 on hard. Guilherme Ochiai claimed a first win over Yuichi Sugita in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-16 | Japan F11 | R32 | hard | Yuichi Sugita | 6-1 6-3 |
| 2006-06-26 | Japan F8 | R32 | hard | Yuichi Sugita | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.