Play began from London on Sunday at the ATP World Tour Finals.
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The 2015 Champion looks to defend her title as play at the WTA Finals moves to the semifinals.
Angelique Kerber and Dominika Cibulkova advanced to the final four of the WTA Finals while Madison Keys and Simona Halep were eliminated.
Svetlana Kuznetsova and Agnieszka Radwanska were winners at the WTA Finals in Singapore on Wednesday.
Madison Keys and Angelique Kerber won their matches at the WTA Finals in Singapore on Tuesday.
Karolina Pliskova and Svetlana Kuznetsova each earned three-set victories in SIngapore.
After an inconsistent season, Eugenie Bouchard will look to regroup for 2017
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