Antonio Pastorino defeated Matias Niemiz 6-1 6-0 in the Uruguay F4 round of 16 on clay. The upset overturned the form book — Matias Niemiz came in leading the head-to-head 1–0. Antonio Pastorino claimed a first win over Matias Niemiz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-11-26 | Uruguay F1 | R32 | clay | Matias Niemiz | 7-6(4) 6-3 |