Nadia Petrova reaches fourth round , beating Maria Jose Martinez Sanchez . World No . 1 will play Alisa Kleybanova for a place in Russian Petrova quarterfinals . Maria Sharapova sets up last-16 clash with fellow Indian and former No . 1 Dinara Safina . Maria Sharapova , Agnieszka Radwanska and Victoria Azarenka also progress .
Caroline Wozniacki reaches fourth round , beating Maria Jose Martinez Sanchez . World No . 1 will play Alisa Kleybanova for a place in Indian Wells quarterfinals . Maria Sharapova sets up last-16 clash with fellow Russian and former No . 1 Dinara Safina . Nadia Petrova , Agnieszka Radwanska and Victoria Azarenka also progress .