Indo-Spanish pair of Sania Mirza and Nuria Llagostera lost out to Americans Raquel Kops-Jones and Abigail Spears in the women's doubles quarter-finals of the Kremlin Cup here on Thursday.

Sania Mirza and her Spanish partner Nuria Llagostera Vives entered the second round of Kremlin Cup after a hard-fought victory over Darya Kustova of Belarus and Ukraine's Olga Savchuk here on Tuesday.

India's Sania Mirza today ended her 2012 season on a disappointing note after she and her partner Nuria Llagostera Vives suffered a straight-set loss in the summit clash of the China Open here.

World number two Maria Sharapova overcame home favourite Li Na in straight sets on Saturday to make the final of the China Open, while Jo-Wilfried Tsonga triumphed in the last four of the men's draw.

It was a mixed day for Indian tennis as Sania Mirza of India and Nuria Llagostera of Spain moved into the women's doubles final of $4.8 million China Open tennis championship while Mahesh Bhupathi and Rohan Bopanna were knocked out in the quarter-final.

World number five Petra Kvitova crashed out of a WTA Tour event in round two for the second week in a row Monday, losing in straight sets at the China Open to unheralded Carla Suarez Navarro.

Sania Mirza and her Spanish partner Nuria Llagostera Vives made a shock first round exit from the Toray Pan Pacific Open after losing to Darija Jurak and Katalin Marosi, here.