Hermes Gamonal defeated Matias Oneille 6-4 6-4 in the Chile 2 Masters 1 round of 32 on clay. The result followed the form book — Hermes Gamonal came in leading the head-to-head 1–0. Hermes Gamonal extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-18 | Paraguay F2 | R16 | clay | Hermes Gamonal | 7-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.