Ana Clara Duarte defeated Daiana Negreanu 4-6 7-6 6-1 in the Sao Paulo 10K qualifying round on clay. The upset overturned the form book — Daiana Negreanu came in leading the head-to-head 1–0. Ana Clara Duarte claimed a first win over Daiana Negreanu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-22 | Sao Jose Dos Campos 10K | R32 | clay | Daiana Negreanu | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.