The eighth seed was beaten by Venezuelan Maria Vento-Kabchi at the US Open.
The Belgian ace made the semi-finals of the Acura Classic along with Justine Henin-Hardenne and Lindsay Davenport.
Sania Mirza entered the main draw after Chanda Rubin pulled out with an ankle inflammation at the WTA event.
A abdominal strain forced the former world No.1 to withdraw from the elite eight-woman event.\n\n
The 20-year-old Belgian won her fourth title at the Luxembourg Open in the past five years.
Despite a dismal year, Dokic ranked 25th in the world did enough to defeat American Rubin, ranked 10th in the world.