Leonardo Mayer defeated Antonio Pastorino 5-7 6-1 6-1 in the Chile F6 round of 32 on clay. The upset overturned the form book — Antonio Pastorino came in leading the head-to-head 1–0. Leonardo Mayer claimed a first win over Antonio Pastorino in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-10-03 | Bolivia F2 | QF | clay | Antonio Pastorino | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.