Gabriel Alejandro Hidalgo defeated Nicolas Pastor 7-5 2-6 6-0 in the Argentina F22 round of 16 on clay. The upset overturned the form book — Nicolas Pastor came in leading the head-to-head 4–0. Gabriel Alejandro Hidalgo claimed a first win over Nicolas Pastor in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-03-26 | Argentina F5 | R32 | clay | Nicolas Pastor | 6-0 6-1 |
| 2010-05-31 | Argentina F7 | QF | clay | Nicolas Pastor | 6-2 6-2 |
| 2009-05-04 | Argentina F4 | R32 | clay | Nicolas Pastor | 3-6 7-6(7) 6-2 |
| 2008-11-03 | Chile F5 | R32 | clay | Nicolas Pastor | 7-6(2) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.