Marco Chiudinelli dumped Hanescu 7-6 (7-4), 6-3 by saving all four of the break points he faced. Hanescu, last year's Mercedes Cup runner-up, dropped serve just once but that was the difference in the second set.
There was only one other regular-draw match on the schedule, which included the completion of qualifying play.
In the main draw, Mischa Zverev stopped Sergiy Stakhovsky 6-4, 6-3. Zverev benefited from five breaks in Stakhovsky's 10 service games and won as many points when received as Stakhovsky did while serving.
The tournament's top seeds -- Nikolay Davydenko, Jurgen Melzer, Gael Monfils and Juan Carlos Ferrero -- all received first-round byes.
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