WTA Championships: Serena Williams defeats Victoria Azarenka – advances to semis
Sharapova, the French Open champion, could still take the No. 1 ranking away from Azarenka.
Williams has dominated the second part of the season, winning Wimbledon, the U.S. Open and Olympic gold in London. She’s won 46 of her last 48 matches, but because of injuries and missed tournaments, cannot attain the top ranking.
Copyright 2012 The Associated Press