Stosur beaten at WTA event in Indian Wells

Samantha Stosur was beaten in straight sets in the second round of the Indian Wells WTA tournament by world No.15 Kristina Mladenovic.

The 2011 US Open champion lost 7-5 7-5 to the French 14th seed.

Stosur is Australia's third-highest ranked woman's player with world No.21 Ashleigh Barty and No.26 Daria Gavrilova yet to play in California after first-round byes.

Elsewhere, two-time Wimbledon champion Petra Kvitova survived the challenge of Yulia Putintseva to prevail 6-7 (4-7) 7-6 (7-3) 6-4.

Japan's Naomi Osaka earned her second-straight victory over an accomplished star with a 6-3 6-2 defeat of Poland's Agnieszka Radwanska.

The 20-year-old Osaka followed up her straight-sets win over Russian five-time Grand Slam champion Maria Sharapova by defeating Radwanska - the 2012 Wimbledon runner-up.

The season struggles of British 11th seed Johanna Konta continued with a 7-6 (7-5) 6-4 loss to 18-year-old Marketa Vondrousova

Aryna Sabalenka and Qiang Wang and accounted for seeded players Svetlana Kuznetsova and Elise Mertens, respectively, to reach the third round.