Celeste Contin defeated Eugenia Chialvo 6-7 6-4 6-1 in the San Juan 10K semi-final on clay. The upset overturned the form book — Eugenia Chialvo came in leading the head-to-head 1–0. Celeste Contin claimed a first win over Eugenia Chialvo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-09-28 | Cordoba 10K | QF | clay | Eugenia Chialvo | 6-4 3-6 4-0 |