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