Antonio Pastorino defeated Leonardo Mayer 6-4 6-2 in the Bolivia F2 qualifying round on clay. The upset overturned the form book — Leonardo Mayer came in leading the head-to-head 1–0, but Antonio Pastorino had been the form player, winning 3 of their last 7 on clay. Antonio Pastorino claimed a first win over Leonardo Mayer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-11-07 | Chile F6 | R32 | clay | Leonardo Mayer | 5-7 6-1 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.