Gustavo Ramirez defeated Marco Simoni 6-4 6-2 in the Paraguay F1 round of 16 on clay. The upset overturned the form book — Marco Simoni came in leading the head-to-head 1–0. Gustavo Ramirez claimed a first win over Marco Simoni in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-10-25 | Paraguay F2 | QF | clay | Marco Simoni | 6-2 6-2 |