Serena doesn't like to lose three matches in a row to anybody, so Sharapova probably won't reach the final.
The WTA Tour Championships final ended with another Russian winning and Serena Williams injured again.
After nearly falling out of this tournament, Amelie Mauresmo has nothing to lose as she faces Kim Clijsters.
It might not be another all-Williams final. Venus Williams only has the slighest edge over Kim Clijsters.
The Williams sisters are favored to be in their first WTA Tour Championships final unless Lindsay Davenport stops them.