Most SF at Australian Open
Just a fun fact...
Maria Sharapova's quarterfinal win puts her in the semifinals for the sixth time in her career. She has now been in the semifinals more times than Steffi Graf (5x), Lindsay Davenport (5x), and Arantxa Sanchez-Vicario (5x).
If Serena wins her quarterfinal, she will also have six semifinal Australian Open appearances.
Sharapova, Evert, Seles, and Hingis all have six appearances.