Leonel Alberti defeated Mauricio Estivariz 6-3 6-2 in the Brazil F18 round of 32 on clay. The upset overturned the form book — Mauricio Estivariz came in leading the head-to-head 1–0. Leonel Alberti claimed a first win over Mauricio Estivariz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-11-14 | Chile F7 | R32 | clay | Mauricio Estivariz | 6-4 7-6(3) |