Kotaro Miyachi defeated Yoshinobu Tanaka 6-4 6-2 in the Japan 1 Masters 2 round of 16 on hard. The upset overturned the form book — Yoshinobu Tanaka came in leading the head-to-head 1–0. Kotaro Miyachi claimed a first win over Yoshinobu Tanaka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-06-07 | Japan 1 Masters 4 | R16 | hard | Yoshinobu Tanaka | 3-6 7-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.