Matias Oneille defeated Eduardo Frick 6-3 3-6 7-6 in the Brazil F3 round of 32 on clay. The result followed the form book — Matias Oneille came in leading the head-to-head 1–0. Matias Oneille extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-19 | Uruguay F1 | R32 | clay | Matias Oneille | 6-0 4-6 6-3 |