Barbara Rush defeated Cecilia Costa Melgar 4-6 7-6 6-4 in the Rancagua 10K round of 32 on clay. Barbara Rush extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-11-30 | La Serena 10K | QF | clay | Barbara Rush | 7-5 6-3 |
| 2008-08-25 | Buenos Aires 10K | R32 | clay | Cecilia Costa Melgar | 6-3 5-7 6-3 |