Leonardo Kirche defeated Antonio Pastorino 2-6 6-1 6-3 in the Mexico F8 round of 16 on hard. The upset overturned the form book — Antonio Pastorino came in leading the head-to-head 2–0. Leonardo Kirche claimed a first win over Antonio Pastorino in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-03-20 | Argentina F2 | R32 | clay | Antonio Pastorino | 7-5 6-1 |
| 2005-10-31 | Chile F5 | R16 | clay | Antonio Pastorino | 6-3 6-2 |