Brian Dabul defeated Matias Oneille 6-3 6-2 in the Argentina F9 qualifying round on clay. The upset overturned the form book — Matias Oneille came in leading the head-to-head 2–1. That levelled the head-to-head at 2–2.
Dabul B. took it in straight sets.
Brian Dabul beat Matias Oneille 6-3 6-2. Umpiry, "Brian Dabul vs Matias Oneille — Argentina F9 Qualifying Round", https://umpiry.com/match/2006-05-29/dabul-vs-oneille-argentina-f9-qf?utm_source=cite (as of 29 May 2006).