Ricardo Siggia defeated Marlon Oliveira 6-1 6-3 in the Brazil F37 round of 32 on clay. The upset overturned the form book — Marlon Oliveira came in leading the head-to-head 1–0. Ricardo Siggia claimed a first win over Marlon Oliveira in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-05-02 | Brazil F12 | R32 | clay | Marlon Oliveira | 6-2 6-2 |