Second seed Alize Cornet came from behind to beat Shahar Peer in the second round of the WTA Guangzhou International Women's Open on Wednesday.
Victoria Azarenka's struggles continued as she was beaten 6-3 6-4 by Ana Ivanovic in the second round of the Toray Pan Pacific Open.
Andy Roddick has confirmed he will make his debut at the Statoil Masters Tennis at London's Royal Albert Hall in December.
Former world No 7 Nicole Vaidisova made a winning return to tennis at the Coleman Vision Tennis Championships in New Mexico on Tuesday.
Top seed Agnieszka Radwanska whitewashed Chanelle Scheepers on her way to the Kia Korea Open quarter-final.
Seventh seed Jerzy Janowicz saw off the spirited challenge of Adrian Mannarino to reach the second round of the Moselle Open in Metz.
Dominika Cibulkova registered her first win in over a month after beating Kirsten Flipkens amid an earthquake at the Toray Pan Pacific Open in Tokyo.
The Davis Cup is to remain an annual tournament according to tennis' governing body in spite of complaints of an over-crowded schedule for players.
Samantha Stosur was stunned by home hope Yafan Wang at the Guangzhou International Women's Open, where only one of the eight seeds reached round two.
Heather Watson was dumped out of the Korea Open in the first round in Seoul on Tuesday, beaten by American qualifier Nicole Gibbs.
World No 2 Simona Halep has become the third player to book her place at the WTA Tour's Finals tournament in Singapore.
Lucia Safarova showed her fighting qualities to overcome Madison Keys at the Pan Pacific Open in Tokyo.