Cecilia Guillenea defeated Daniela Olivera 6-3 6-3 in the Lima 10K round of 32 on clay. The upset overturned the form book — Daniela Olivera came in leading the head-to-head 1–0, but Cecilia Guillenea had been the form player, winning 4 of their last 6 on clay. Cecilia Guillenea claimed a first win over Daniela Olivera in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-31 | Azemeis 10K | R32 | clay | Daniela Olivera | 6-3 6-2 |