Petkovic and Sharapova both seem capable of winning or losing tomorrow. They both have monster forehands, but are also UE machines at times. Sharapova probably is the better player, but she's not in as good of form.
As good as Azarenka has been on clay, Li holds a decisive h2h record against her. So, is it worth it to lay the juice on a player that doesn't fare well against her opponent?