BELGRADE, Serbia -- Second-seeded Ivo Karlovic advanced to the quarterfinals of the Serbia Open after beating Brian Dabul of Argentina 6-4, 7-6 (5) on Thursday.
Karlovic will meet Italian qualifier Flavio Cipolla, who eliminated seventh-seeded Frenchman Arnaud Clement 1-6, 6-4, 6-3.
Cipolla had made it into the second round after eliminating another prominent player, Marcos Baghdatis of Cyprus, in his first match.
Sixth-seeded Ivan Ljubicic of Croatia was eliminated by Marcos Daniel of Brazil 6-4, 6-4, while fourth-seeded Italian Andreas Seppi advanced by beating Leonardo Mayer of Argentina 6-4, 6-1.
Top-seeded Novak Djokovic, whose family brought the tournament to Serbia this year after buying the license to the ABM Amro Open, advanced on Wednesday.