UMAG, Croatia (AP)—Defending champion Juan Carlos Ferrero of Spain has defeated third-seeded Croatian Ivan Ljubicic to reach the quarterfinals of the Croatia Open.Ferrero rallied from one set down and saved a break point at 3-3 in the second to change the course of the match and beat Ljubicic 1-6, 6-3, 6-4 on Wednesday.Ljubicic, playing for the first time in a a month, impressed during the first set but could not keep up the pace.Ferrero will next face Carlos Berlocq of Argentina who won in a walkover, after fifth-seeded Tommy Robredo of Spain withdrew because of a left calf injury.Also Wednesday, Albert Ramos of Spain defeated Gianluca Naso of Italy 6-1, 6-3.