WTA semifinal lineup complete

Published 2034 GMT (0434 HKT) October 25, 2013
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A subdued Li Na acknowledges the Istanbul crowd after becoming the first Chinese player to reach the semifinals of the WTA Championships. BULENT KILIC/AFP/Getty Images
The 31-year-old comfortably beat world No. 2 Victoria Azarenka, who refused to retire despite a debilitating back spasm that ended her chances of repeating her run to the 2011 final. BULENT KILIC/AFP/Getty Images
Li will next face 2011 champion Petra Kvitova, who came from behind to beat Germany's Angelique Kerber in three sets to secure second place in the Red Group behind Serena Williams. Dean Mouhtaropoulos/Getty Images
World No. 1 Williams will take on Serbia's Jelena Jankovic, who finished second behind Li in the White Group despite losing her closing match to Italy's Sara Errani. BULENT KILIC/AFP/Getty Images
Defending champion Williams had a rest on Friday, having already sealed her semifinal berth with three successive victories. Matthew Stockman/Getty Images