Michihisa Onoda defeated Yasufumi Yamamoto 6-2 7-6 in the Japan F5 round of 32 on hard. The upset overturned the form book — Yasufumi Yamamoto came in leading the head-to-head 2–1, but Michihisa Onoda had been the form player, winning 6 of their last 9 on hard. Michihisa Onoda narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-05-08 | Japan F4 | R16 | hard | Yasufumi Yamamoto | 1-6 6-3 6-4 |
| 1998-10-07 | Japan F4 | R16 | carpet | Michihisa Onoda | 6-2 6-1 |
| 1998-09-30 | Japan F3 | R32 | carpet | Yasufumi Yamamoto | 1-6 6-1 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.