Yasufumi Yamamoto defeated Kotaro Miyachi 2-6 7-6 6-3 in the Japan 1 Masters 2 qualifying round on hard. The upset overturned the form book — Kotaro Miyachi came in leading the head-to-head 2–1. Yasufumi Yamamoto narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-11-17 | Japan 2 Masters 1 | QF | hard | Yasufumi Yamamoto | 6-3 4-6 7-5 |
| 1996-11-04 | Japan 2 Masters 1 | R16 | hard | Kotaro Miyachi | 6-3 6-4 |
| 1993-11-08 | Japan Masters 3 | SF | hard | Kotaro Miyachi | 6-3 2-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.