Yoshinobu Tanaka defeated Kotaro Miyachi 3-6 7-6 6-2 in the Japan 1 Masters 4 round of 16 on hard. The upset overturned the form book — Kotaro Miyachi came in leading the head-to-head 1–0. Yoshinobu Tanaka claimed a first win over Kotaro Miyachi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-29 | Japan 1 Masters 2 | R16 | hard | Kotaro Miyachi | 6-4 6-2 |