Rene Nicklisch defeated Markus Wislsperger 6-4 6-0 in the Mexico 1 Masters 4 round of 32 on hard. The upset overturned the form book — Markus Wislsperger came in leading the head-to-head 1–0, but Rene Nicklisch had been the form player, winning 3 of their last 4 on hard. Rene Nicklisch claimed a first win over Markus Wislsperger in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-03-07 | Mexico 1 Masters 3 | SF | hard | Markus Wislsperger | 7-6 3-6 7-5 |