Bo Ram Cha defeated Juan Manuel Valverde 6-2 6-4 in the Argentina F4 round of 32 on clay. The upset overturned the form book — Juan Manuel Valverde came in leading the head-to-head 1–0. Bo Ram Cha claimed a first win over Juan Manuel Valverde in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-10-03 | Bolivia F2 | R32 | clay | Juan Manuel Valverde | 4-6 6-4 6-3 |