Lars Kirschner defeated Oscar Rodriguez Arg 6-2 6-1 in the Greece F3 round of 16 on hard. The upset overturned the form book — Oscar Rodriguez Arg came in leading the head-to-head 1–0. Lars Kirschner claimed a first win over Oscar Rodriguez Arg in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-06-15 | Netherlands Masters 2 | R32 | clay | Oscar Rodriguez Arg | 6-4 6-7 6-3 |