Mariana Conde defeated Sheila Guerberg 5-7 6-1 6-3 in the Campo Grande 10K round of 16 on clay. The upset overturned the form book — Sheila Guerberg came in leading the head-to-head 1–0. Mariana Conde claimed a first win over Sheila Guerberg in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-10-03 | Cordoba 10K | R32 | clay | Sheila Guerberg | 6-1 6-2 |