Second-seeded Roberta Vinci reached the Italiacom Open quarter-finals following a 6-2, 7-6 (7/3) victory over 2011 runner-up Polona Hercog of Slovenia on Thursday.
Vinci was broken four times in the second set by Hercog.
The Italian next faces fifth-seeded Spaniard Lourdes Dominguez Lino, who beat Nastassja Burnett of Italy 7-5, 4-6, 6-3.
Third-seeded Kristina Mladenovic was eliminated after a second-round upset by Estrella Cabeza Candela of Spain. The 20-year-old Frenchwoman lost 3-6, 6-2, 6-7 (6/8). Candela faces Renata Voracova in the quarter-finals.
Fourth-seeded Klara Zakopalova of the Czech Republic was safely through after beating Karin Knapp of Italy 6-3, 4-6, 6-4 in a match that lasted two hours, 40 minutes. Zakopalova will play Dinah Pfizenmaier of Germany.
Chanelle Scheepers of South Africa reached her third quarter-final of the year when she defeated Petra Martic of Croatia 7-5, 6-4 at the Hungarian Grand Prix on Thursday.
Scheepers’ next opponent will be Danka Kovinic of Montenegro, who beat Valeria Solovyeva of Russia 6-1, 3-6, 6-1.
Shahar Peer of Israel knocked out eighth-seeded Anna Tatishvili of Georgia 6-1, 6-1, leaving just three seeded players in the last eight. Peer will face Romania’s Alexandra Cadantu.