Sania Mirza maintained her sparkling form to shock World No.19 Tatiana Golovin of France 6-4, 6-1 and reach the quarterfinals of the USD 600,000 Bank of West Classic women's tennis tournament at Stanford on Thursday.
The 20-year-old Indian, for whom the US hard courts have become a happy hunting ground, was ecstatic about her first win against Golovin who had a 2-0 head to head record going into the match.
"Beating a top-20 player is always good, especially beating someone you have never beaten before," the Hyderabadi girl said after the match.
"It is definitely one of my top wins. She is in the top 20 and playing well this year."
Sania, who reached the semifinals at Cincinnati last week, next faces last year's finalist, Patty Schnyder of Switzerland.
The fourth seed downed Yaroslava Shvedova 7-5, 6-2.
Meanwhile, Sania's partner in doubles, Shahar Peer of Israel, went down to Olga Govortsova of Belarus 6-4, 5-7, 2-6.
Top seed Anna Chakvetadze of China, Sania's conquerer and eventual champion at Cincinnati, defeated Eleni Daniilidou of Greece 6-4, 6-1 in another second round match.