Caroline Wozniacki is World Number One twice in the row


Maria Sharapova has pulled out of the match at the WTA Championships. Her swollen ankle has prevented her to move on and her retreat from this game has officiate the title of World Number One for Caronline Wozniacki. The Dane played well but lost to Petra Kvitova. The wimbledon champion continue to win the cool US Open Champion to advance to the final where she will meet Azarenka for this season.