Gerardo Mirad defeated Sebastian Prieto 6-3 6-3 in the Argentina 3 Masters 4 round of 32 on clay. The upset overturned the form book — Sebastian Prieto came in leading the head-to-head 2–0. Gerardo Mirad claimed a first win over Sebastian Prieto in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1995-09-02 | Argentina 2 Masters 4 | R16 | clay | Sebastian Prieto | 3-0 |
| 1993-04-10 | Argentina 1 Masters 3 | R32 | clay | Sebastian Prieto | 6-2 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.