Tatiana Bua defeated Frederica Piedade 6-3 3-6 7-5 in the Amarante 10K qualifying round on hard. The upset overturned the form book — Frederica Piedade came in leading the head-to-head 1–0. Tatiana Bua claimed a first win over Frederica Piedade in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-07-27 | Vigo 25K | R32 | hard | Frederica Piedade | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.