Top-seeded Tipsarevic into Bucharest quarters
Tipsarevic dropped serve just once and saved eight of the nine break points he faced, while breaking Giraldo four times.
"I don't think it was an easy game, despite the score," Tipsarevic said.
Also, Romania's Victor Hanescu topped fourth-seeded Mikhail Youzhny of Russia 6-4, 6-3 without losing his serve, and No. 5 Florian Mayer defeated David Goffin of Belgium 7-6 (2), 1-6, 6-3. Hanescu will play Mayer on Friday.
Copyright 2013 by The Associated Press
This story is from ESPN.com's automated news wire. Wire index