The Associated Press
Former No. 1 Wozniacki to retire after Australian OpenFILE - In this Friday, Oct. 4, 2019 file photo, Caroline Wozniacki of Denmark reacts after beating Daria Kasatkina of Russia in their quarterfinal match in the China Open tennis tournament in Beijing. Wozniacki has announced on Friday, Dec. 6, 2019 she will retire after the Australian Open. (AP Photo/Mark Schiefelbein, file)
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