Alex Sugai defeated Hiroyasu Sato 2-6 7-6 7-5 in the Japan 2 Masters 1 round of 32 on hard. The upset overturned the form book — Hiroyasu Sato came in leading the head-to-head 1–0. Alex Sugai claimed a first win over Hiroyasu Sato in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-29 | Japan 1 Masters 1 | R32 | hard | Hiroyasu Sato | 7-5 3-6 7-6 |