Sixth-seeded Li Na of China defeated Iveta Benesova of the Czech Republic, winning 6-4, 4-6, 6-2 to join Cirstea in Saturday's semifinals.
Top-seeded Elena Dementieva played former top-ranked Amelie Mauresmo later Friday.
Lisicki upsets Peng at Tashkent Open
WC Debate: Who Are The Greatest-Ever World Cup Nation?
