Top-ranked Serena Williams beat former No. 1 Caroline Wozniacki 6-1, 6-4 to raise her career record to 6-1 against the Dane in the quarter finals of China Open. Williams will face Agnieszka Radwanska, 2011 champion, in the semi finals. Radwanska came through after beating Angelique Kerber of Germany. In the women's draw, former Wimbledon champion Petra Kvitova beat local
favorite Li Na 4-6, 6-2, 6-4 to set up a semifinal with Jelena Jankovic, who also came from a set down to beat Lucie Safarova of the Czech Republic 6-7 (3), 6-4, 6-4.