TOKYO: Dominika Cibulkova of Slovakia reached the quarterfinals of the Toray Pan-Pacific Open on Thursday by beating sixth-seeded Carla Suarez Navarro of Spain 6-4, 6-4. Cibulkova improved her record to 3-0 against Suarez Navarro, who had not won a match in seven tournaments before beating Kateryna Bondarenko here in the first round. Seventh-seeded Agnieszka Radwanska also reached the final eight by beating Elina Svitolina of Ukraine 6-4, 6-1 and will play Karolina Pliskova of the Czech Republic, who eliminated the last remaining Japanese player by defeating Kurumi Nara 6-2, 6-4. The 11th-ranked Pliskova served 10 aces and rallied from 4-1 down in the second set to clinch the match.