I mean, if these players were to face each other, who would overpower whom?
Henin, Clijsters, Capriati, Seles, Kuznetsova, Sharapova, Dementieva, Azarenka, Graf, Li Na, Ivanovic
Keep in mind that overpowering doesn't mean winning. I'm pretty sure Hingis didn't hit anywhere as big as Seles, yet she would typically beat her.
Li Na
Sharapova
Ivanovic
Seles
Kuznetsova
Dementieva
Capriati
Clijsters
Graf
Henin
Azarenka