Juan Manuel Valverde defeated Ricardo Siggia 7-5 7-6 in the Brazil F19 round of 16 on clay. The upset overturned the form book — Ricardo Siggia came in leading the head-to-head 2–0, but Juan Manuel Valverde had been the form player, winning 3 of their last 7 on clay. Juan Manuel Valverde claimed a first win over Ricardo Siggia in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-10-19 | Brazil F24 | QF | clay | Ricardo Siggia | 6-7(4) 6-4 6-3 |
| 2008-07-28 | Brazil F13 | R32 | clay | Ricardo Siggia | 6-2 6-1 |