Ana slipped to a 6-3, 6-2 defeat to Britain's Anne Keothavong in the second round of the BGL BNP Paribas Luxembourg Open.
The 23-year-old looked sluggish and, after leading 3-2, lost 12 of the next 14 games. Keothavong, on the other hand, produced one of her best ever performances.
The Briton looked confident and executed a fine array of forehand winners.
Ana's next event is the Commonwealth Bank Tournament of Champions in Bali, which begins on Thursday 3 November.
The 23-year-old looked sluggish and, after leading 3-2, lost 12 of the next 14 games. Keothavong, on the other hand, produced one of her best ever performances.
The Briton looked confident and executed a fine array of forehand winners.
Ana's next event is the Commonwealth Bank Tournament of Champions in Bali, which begins on Thursday 3 November.
