Ana Clara Duarte defeated Teliana Pereira 7-5 6-2 in the Rio De Janeiro 25K round of 16 on clay. The upset overturned the form book — Teliana Pereira came in leading the head-to-head 3–2, but Ana Clara Duarte had been the form player, winning 3 of their last 8 on clay. Ana Clara Duarte narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-10-29 | Buenos Aires 25K | R32 | clay | Teliana Pereira | 6-1 6-1 |
| 2010-07-19 | Brasilia 10K | QF | hard | Ana Clara Duarte | 6-3 3-6 6-3 |
| 2008-11-24 | Buenos Aires 10K | R32 | clay | Ana Clara Duarte | 7-6(4) 4-2 |
| 2007-08-13 | Bogota 25K | R16 | clay | Teliana Pereira | 6-3 6-3 |
| 2003-11-03 | Belo Horizonte 10K | R32 | hard | Teliana Pereira | 6-3 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.