Yasufumi Yamamoto defeated Kotaro Miyachi 6-3 4-6 7-5 in the Japan 2 Masters 1 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 |
|---|---|---|---|---|---|
| 1999-06-07 | Japan 1 Masters 2 | QF | hard | Yasufumi Yamamoto | 2-6 7-6 6-3 |
| 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 (2 vs 2). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About