Hanescu pulled off the most lop-sided win of Tuesday's schedule with a 6-2, 6-0 victory over Horacio Zeballos in just 54 minutes. Hanescu took more than two-thirds of the points in the match, including 88 percent -- 28-of-32 -- points on serve. He lost only one point over three service games in the second set.
Third-seeded Janko Tipsarevic also advanced in straight sets, dispatching Igor Kunitsyn 6-4, 6-2. He didn't face a break point as he only lost six points on serve.
Illya Marchenko was ahead 6-2, 2-2 when No. 6-seeded Denis Istomin suffered a right knee injury and retired from the match.
A trio of qualifiers advanced to the second round. Evgeny Donskoy edged Andrey Kuznetsov 7-5, 7-6 (7-2); Rajeev Ram defeated Pablo Andujar 6-3, 6-7 (5-7), 6-3; and Konstantin Kravchuk ousted Frantisek Cermak 6-2, 6-3.
Tuesday's other matches saw Paul-Henri Mathieu beat Maximo Gonzalez 6-4, 6-3; and wild-card entrant Dmitry Tursunov get past Michal Przysiezny 3-6, 6-3, 6-2.