Samantha Stosur vs. Petra Kvitova
If there is a bad match up for Stosur, it is Kvitova. Samantha's kick serve to Kvitova's lethal forehand will just be punished by the tall Czech. The only thing that should favour the Aussie is that Kvitova might be tired after playing so many matches in 2 weeks. I still think that Petra has enough reserve to win this, and reach her second consecutive final.
Pick: Kvitova in 2 sets
Maria Sharapova vs. Ana Ivanovic
Ana Ivanovic trails the head-to-head with Sharapova, but has won their last 2 encounters. The last being the controversial "check her blood pressure" match in Cincinnati. I'm sure Sharapova will be very eager to beat Ana given how vocal she has been about Ana's suspect medical timeouts. Ana does hold an advantage though, winning Tokyo 2 weeks ago and having an extra day's rest. This will be a close contest for sure, and with her place secured in Singapore, I think Ana will go out free swinging and snatch another win from the tall Russian.
Pick: Ivanovic in 3 sets