Sharapova - Vaidisova. I used to shudder at this prospect but not anymore. I'd like to see it happen just not yet in Moscow, maybe Zurich. lol...
Sharapova - Ivanovic would be good too although Ana seems more of a threat than Nicole nowadays.
Clijsters - Ivanovic
Hingis - Jankovic
Davenport - Ivanovic