Barbara Rush defeated Lucia Jara Lozano 6-3 6-4 in the Tandil 10K semi-final on clay. The upset overturned the form book — Lucia Jara Lozano came in leading the head-to-head 1–0. Barbara Rush claimed a first win over Lucia Jara Lozano in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-11-16 | Asuncion 10K | R16 | clay | Lucia Jara Lozano | 6-4 4-1 |