Lucia Jara Lozano defeated Tatiana Bua 6-4 3-6 7-6 in the Buenos Aires 10K semi-final on clay. The upset overturned the form book — Tatiana Bua came in leading the head-to-head 4–0, but Lucia Jara Lozano had been the form player, winning 2 of their last 4 on clay. Lucia Jara Lozano claimed a first win over Tatiana Bua in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-12-01 | Buenos Aires 10K | R16 | clay | Tatiana Bua | 7-6(2) 4-6 7-5 |
| 2008-11-17 | Montevideo 10K | R32 | clay | Tatiana Bua | 6-2 2-6 7-6(5) |
| 2008-09-01 | Buenos Aires Garin 10K | R16 | clay | Tatiana Bua | 7-5 6-3 |
| 2008-04-21 | Toluca 10K | R32 | hard | Tatiana Bua | 6-0 6-1 |