Who has the edge in Tuesday's French Open quarterfinal showdowns?
beat Grace Min, No. 1 Serena Williams, Anna Schmiedlova and Paula Parmentier. Sharapova beat Ksenia Pervak, Tsvetana Pironkova , Paula Ormaechea and No. 19 Sam Stosur. Reason to like Muguruza: She's the clear-cut darling of the tournament