Patrick Erhardt defeated Masashi Tokumaru 6-2 6-3 in the Japan 2 Masters 4 round of 16 on hard. The upset overturned the form book — Masashi Tokumaru came in leading the head-to-head 2–0, but Patrick Erhardt had been the form player, winning 1 of their last 4 on hard. Patrick Erhardt claimed a first win over Masashi Tokumaru in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-03-17 | Japan F1 | R32 | clay | Masashi Tokumaru | 6-1 4-1 |
| 1998-10-07 | Japan F4 | R32 | carpet | Masashi Tokumaru | 2-6 6-1 7-6 |