Kotaro Miyachi defeated Tasuku Iwami 3-6 7-6 7-5 in the Japan F4 round of 32 on hard. The upset overturned the form book — Tasuku Iwami came in leading the head-to-head 2–1. Kotaro Miyachi narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-09-25 | Japan F8 | R16 | hard | Tasuku Iwami | 6-1 7-6(4) |
| 2000-09-11 | Japan F6 | R32 | hard | Tasuku Iwami | 6-3 7-6(4) |
| 1998-11-18 | Japan F5 | R16 | hard | Kotaro Miyachi | 4-6 6-3 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.