Bethanie Mattek-Sands of the U.S., left. shakes hands with Agnieszka Radwanska of Poland after their women's singles match at the Sydney International tennis tournament in Sydney, Australia, Tuesday, Jan. 7, 2014.  (AP Photo/Daniel Munoz)

Australia Tennis Sydney International

Bethanie Mattek-Sands of the U.S., left. shakes hands with Agnieszka Radwanska of Poland after their women's singles match at the Sydney International tennis tournament in Sydney, Australia, Tuesday, Jan. 7, 2014. (AP Photo/Daniel Munoz)

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