Oliver Marach defeated Federico Luzzi 6-3 6-3 in the Doha qualifying round of 16 on hard. The upset overturned the form book — Federico Luzzi came in leading the head-to-head 2–1. That levelled the head-to-head at 2–2.
Marach O. took it in straight sets.
Hard: Marach O. leads 1–0 · Clay: Luzzi F. leads 2–1
Oliver Marach beat Federico Luzzi 6-3 6-3. Umpiry, "Oliver Marach vs Federico Luzzi — Doha Qualifying Round of 16", https://umpiry.com/match/2006-01-01/luzzi-vs-marach-doha-q16?utm_source=cite (as of 1 January 2006).