Defending champion Lukas Rosol reached the Nastase Tiriac Trophy quarterfinals with a 6-2, 6-4 victory over eighth-seeded Jarkko Nieminen of Finland on Wednesday.

The Czech saved seven of the eight break points he faced on the clay at BNR Arenas.

Home favorite Victor Hanescu failed to advance, though, as fourth-seeded Gilles Simon of France rallied from a set down to win 2-6, 6-3, 6-3.

In other matches, top-seeded Grigor Dimitrov of Bulgaria defeated Jiri Vesely of the Czech Republic 7-6 (5), 6-2, while Ukraine's Sergiy Stakovsky downed Carlos Berlocq of Argentina 4-6, 7-6 (5), 6-2 in a match lasting 2 hours, 21 minutes.