Angelique Kerber of Germany plays a backhand shot in her first round match against Kaia Kanepi of Estonia during the Sydney International tennis tournament in Sydney, Australia, Tuesday, Jan. 7, 2014. (AP Photo/Rob Griffith)

Australia Tennis Sydney International

Angelique Kerber of Germany plays a backhand shot in her first round match against Kaia Kanepi of Estonia during the Sydney International tennis tournament in Sydney, Australia, Tuesday, Jan. 7, 2014. (AP Photo/Rob Griffith)

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