Michihisa Onoda defeated Toshiaki Sakai 4-6 6-3 7-5 in the Japan F7 round of 16 on hard. The upset overturned the form book — Toshiaki Sakai came in leading the head-to-head 2–0, but Michihisa Onoda had been the form player, winning 5 of their last 7 on hard. Michihisa Onoda claimed a first win over Toshiaki Sakai in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-04-15 | Japan F2 | R32 | carpet | Toshiaki Sakai | 6-4 7-6(9) |
| 1996-11-04 | Japan 2 Masters 1 | R16 | hard | Toshiaki Sakai | 6-4 6-3 |