Kentaro Masuda defeated Akira Matsushita 6-4 6-1 in the Japan F1 round of 16 on carpet. The result followed the form book — Kentaro Masuda came in leading the head-to-head 2–0. Kentaro Masuda extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-03-25 | Japan F2 | R16 | carpet | Kentaro Masuda | 7-6 2-6 6-1 |
| 1997-11-17 | Japan 2 Masters 4 | F | hard | Kentaro Masuda | 6-2 6-0 |