Ana is seeded fifth at the Mercury Insurance Open in Carlsbad, close to San Diego, and receives a bye in round one. In the second round she will face eitherthis week's conqueror Ayumi Morita or Australian Jelena Dokic.
The Japanese's victory over Ana in Stanford this week squared their head-to-head series at one win apiece. Ana has a 1-0 historical advantage over Dokic.
In round three of the 56-player draw Ana could face Italian former top 10-ranked player Flavia Pennetta, while fourth seed Shuai Peng of China could await in the last eight.
Top seed and world No.3 Vera Zvonareva is a likely semi-final adversary.
The leading seeds in the bottom half of the draw, whom Ana cannot face until the final, are No.2 Andrea Petkovic, No.3 Agnieszka Radwanska, No.7 Julia Goerges and No.8 Daniela Hantuchova.
