New world number one Caroline Wozniacki moved through to the semi-finals of the China Open with a 7-6 (7-1) 6-4 victory over unseeded Ana Ivanovic of Serbia.
Ivanovic, a former world number one, fought back from 5-2 to 5-4 but finally lost in an hour and 54 minutes.
Vera Zvonareva beat French Open champion Francesca Schiavone 6-0 6-2 in a match that lasted just 54 minutes.
Next up for Zvonareva is local star and ninth seed Li Na, who beat qualifier Anastasija Sevastova 7-6 (8-6) 6-3.
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