Hiroyasu Sato defeated Alex Sugai 7-5 3-6 7-6 in the Japan 1 Masters 1 round of 32 on hard. The upset overturned the form book — Alex Sugai came in leading the head-to-head 1–0, but Hiroyasu Sato had been the form player, winning 2 of their last 8 on hard. Hiroyasu Sato claimed a first win over Alex Sugai in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-11-17 | Japan 2 Masters 1 | R32 | hard | Alex Sugai | 2-6 7-6 7-5 |