Sebastian Prieto defeated Agustin Mundina 6-3 7-6 in the Argentina 2 Masters 4 round of 32 on clay. The upset overturned the form book — Agustin Mundina came in leading the head-to-head 1–0. Sebastian Prieto claimed a first win over Agustin Mundina in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-08-14 | Argentina 3 Masters 2 | R32 | clay | Agustin Mundina | 6-3 0-6 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.