New world number one Caroline Wozniacki overcame a knee injury to reach the semi-finals of the China Open with a 7-6 (7-1) 6-4 win over Ana Ivanovic. Leading by a set and 3-1 Wozniacki fell clutching her left knee but recovered to win 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. Wozniacki’s injury scare was the result of overstretching as she smashed a backhand return. She took an injury time out to get the knee strapped, and though former world number one Ivanovic briefly rallied from 2-5 to 4-5, she could not deny the Dane her place in the last four. “I felt pain when I jumped down on my knee. Not very nice thoughts went through my mind,” 20-year-old Wozniacki admitted. “It was a bit of a scare. But I have had treatment and it feels better.” Of her elevation to top spot in the world she said: “It was a great feeling to wake up knowing I was the world number one but on the court it didn’t feel different.”
Her next opponent will be Shahar Peer of Israel, who defeated Switzerland’s Timea Bacsinszky 7-6 (7-4) 6-4.