Los Angeles quarterfinals to be played Friday

Here is the lineup for the quarterfinals in Los Angeles:

Zheng Jie (14) vs. Samantha Stosur (13)

Sorana Cirstea vs. Agnieszka Radwanska (8)

Urszula Radwanska vs. Maria Sharapova

Flavia Pennetta (10) vs. Vera Zvonareva (2)