Simon Aspelin defeated Bjorn Jacob 6-1 6-2 in the USA 5 Masters 2 round of 32 on hard. The upset overturned the form book — Bjorn Jacob came in leading the head-to-head 1–0. Simon Aspelin claimed a first win over Bjorn Jacob in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-25 | USA F3 | R64 | clay | Bjorn Jacob | 6-3 5-7 6-3 |