Federico Dondo defeated Hermes Gamonal 4-6 6-4 6-1 in the Argentina 1 Masters 2 semi-final on clay. The result followed the form book — Federico Dondo came in leading the head-to-head 1–0. Federico Dondo extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-05-10 | Chile F1 | SF | clay | Federico Dondo | 7-5 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.