Matias Oneille defeated Martin Vassallo Arguello 4-6 6-4 6-3 in the Argentina F5 qualifying round 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 |
|---|---|---|---|---|---|
| 2001-03-19 | Argentina F2 | R32 | clay | Matias Oneille | 2-6 6-4 7-6(7) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.