NEW DELHI: Sania Mirza showed signs of her fine form with a straight-set victory over former world no. 11 Meghan Shaunessy in the first round of the USD 1.3 million Acura Classic WTA Tour event in San Diego, California.

Sania, whose ranking has slipped to 44, posted a crisp 6-3, 6-1 over Shaugnessy, who has four career titles to her credit, to sail into the second round of the US hard court event on Tuesday.

The 19-year old Indian next plays Katarina Srebotnik of Slovakia in the second round later on Wednesday.