Russian 10th seed Ekaterina Makarova admitted Thursday she needed to improve her mental strength after allowing second seeded compatriot Maria Sharapova to run riot in their Australian Open semi-final.
German fourth seed Andrea Petkovic defeated second-seeded Slovakian Dominika Cibulkova 7-5, 6-3 on Thursday to become the first player to qualify for the semi-finals of the WTA Tournament Of Champions.
Wimbledon runner-up Eugenie Bouchard, Poland`s Agnieszka Radwanska, US Open finalist Caroline Wozniacki and former French Open champion Ana Ivanovic have wrapped up the last four spots at the season-ending WTA Finals in Singapore.
Sania Mirza, who will be skipping the Asian Games to focus on qualifying for the BNP Paribas WTA Finals in Singapore, and Cara Black are lying fourth in the Race to Singapore standings with just over a month to go for the season-ending WTA Finals in Singapore.
Two-times defending champion Serena Williams, in her black and white leopard dress, started quietly before roaring past 11th seed Flavia Pennetta 6-3 6-2 to reach the semi-finals of the U.S. Open on Wednesday.