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.
India`s Sania Mirza and her Zimbabwean partner Cara Black knocked out second-seeded Russians Ekaterina Makarova and Elena Vesnina toenter the semi-finals of the women`s doubles at the BNP Paribas Open tennis tournament here.
Venus Williams is close to her best again, according to Ana Ivanovic, the former world number one from Serbia, who managed to take only three games off the seven times former Grand Slam winner at the Dubai Open on Wednesday.
Women`s world number one Serena Williams eased into the third round of the WTA Dubai Open on Tuesday in her first match back since injuring her back at the Australian Open beating Ekaterina Makarova 7-6 (10/8), 6-0.