Ana beat world No.1 Serena Williams 6-4, 6-4 in the Energi Danmark Champions Battle 2014.
The 27-year-old triumphed in an hour-and-a-half in front of a packed crowd of 7,000 in Herning, Denmark.
Click here to see photos from the event.
Ana will taken on world No.1 Serena Williams in an exhibition match in Denmark on Wednesday.
Ana and Williams have faced each other nine times in WTA matches, with the American holding an 8-1 advantage.
They also played each other in an exhibition event in New York in 2010, when Williams won 6-4....
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