Kotaro Miyachi defeated Ryuso Tsujino 6-3 6-4 in the Japan Masters 3 round of 16 on hard. The upset overturned the form book — Ryuso Tsujino came in leading the head-to-head 3–1, but Kotaro Miyachi had been the form player, winning 3 of their last 8 on hard. Kotaro Miyachi narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-06-07 | Japan 1 Masters 1 | R16 | hard | Ryuso Tsujino | 6-4 6-4 |
| 1999-05-12 | Japan F3 | R16 | hard | Kotaro Miyachi | 6-4 6-3 |
| 1996-11-04 | Japan 2 Masters 4 | QF | hard | Ryuso Tsujino | 7-5 7-6 |
| 1993-11-08 | Japan Masters 4 | QF | hard | Ryuso Tsujino | 6-7 6-1 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.