Sharapova will play either second-seeded Li Na or qualifier Bethanie Mattek-Sands for the title in the indoor clay-court tournament Sunday.

NPR: Sharapova Beats Kerber To Reach Stuttgart Final

As for Williams, she still has a chance of reclaiming the World No. 1 ranking if defending champion Azarenka doesn't retain her title or if Maria Sharapova loses her semifinal against Li Na.

WSJ: Serena Williams Knocked Out of Australian Open