Matias Oneille defeated Marcos Daniel 7-5 7-6 in the Peru F3 semi-final on clay. The upset overturned the form book — Marcos Daniel came in leading the head-to-head 1–0. Matias Oneille claimed a first win over Marcos Daniel in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-06-11 | Brazil F3 | R16 | clay | Marcos Daniel | 6-3 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.