Rodrigo Antonio Grilli defeated Renato Silveira 6-1 6-1 in the Brazil F16 round of 32 on clay. The upset overturned the form book — Renato Silveira came in leading the head-to-head 1–0, but Rodrigo Antonio Grilli had been the form player, winning 2 of their last 8 on clay. Rodrigo Antonio Grilli claimed a first win over Renato Silveira in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-15 | Brazil F1 | R16 | clay | Renato Silveira | 3-6 7-5 6-2 |