Diego Matos defeated Charles Costa 7-6 6-3 in the Brazil F19 round of 16 on clay. The upset overturned the form book — Charles Costa came in leading the head-to-head 1–0. Diego Matos claimed a first win over Charles Costa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-07-23 | Brazil F18 | R32 | clay | Charles Costa | 7-6(0) 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.