Li Na vs. Petra Kvitova
A win here will give Li a number 3 career high ranking, so a lot is at stake for the Chinese. For someone who has a Grand Slam and a long illustrious career, not reaching the top 3 is a blemish. I'm sure Li will be very motivated to achieve that milestone. However, Kvitova looks to be in ominous form and looks ready to take down Li (in 3 sets no doubt). Petra has won 2 of their 3 hard court encounters, and their last meeting in Beijing. Will she inflict the same damage to Li? Against Azarenka, Li had the tough task of playing against the injured opponent, but she never lost focus and continued playing her game. Looks like she is working on her concentration and it's showing. Against someone whose concentration fades in and out, Li can take advantage.
Pick: Li in 3 sets
Serena Williams vs. Jelena Jankovic
I guess Jelena already knew she qualified, so she didn't give her 100% against Errani. But any self-respecting professional will give her all no matter what the circumstances. Against Serena, Jankovic will be bludgeoned even if she gives her all.
Pick: Williams in 2 easy sets