Rodolfo Daruich defeated Alejandro Kon 6-4 6-4 in the Argentina F5 round of 16 on clay. The upset overturned the form book — Alejandro Kon came in leading the head-to-head 1–0. Rodolfo Daruich claimed a first win over Alejandro Kon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-04-10 | Uruguay F1 | R32 | clay | Alejandro Kon | 6-1 6-2 |