Julie Thu defeated Gisela Riera Roura 5-7 6-2 6-2 in the Lima 25K round of 32 on clay. The upset overturned the form book — Gisela Riera Roura came in leading the head-to-head 1–0, but Julie Thu had been the form player, winning 4 of their last 6 on clay. Julie Thu claimed a first win over Gisela Riera Roura in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-11-30 | Bogota 25K | R32 | clay | Gisela Riera Roura | 6-2 4-6 6-2 |