Petra Kvitova beats Maria Sharapova to reach the title match of the season-ending WTA Finals where she will face Agnieszka Radwanska, who overcame Garbine Muguruza in Singapore. Meanwhile Martina Hingis and Sania Mirza defeat Chan Hao-Ching and Chan Yung-Jan to set-up a WTA Finals doubles final clash with Muguruza and Carla Suarez Navarro.

Script:

SOUNDBITE (English) Petra Kvitova, beat beat Maria Sharapova 6-3 7-6 (7-3):(being in final after losing twice in group stage)

"It's very weird, I have to say. Yesterday I was talking about my season, and it's still not over yet. But I'm happy for that for sure. I mean, I couldn't really believe that I going to play semi-final; now I'm the final, which is very interesting. I'm really looking forward. I think Aga (Agnieszka Radwanska) is kind of in the same situation, so it's going to be interesting."

SOUNDBITE (English) Maria Sharapova, lost 6-3 7-6 (7-3) to Petra Kvitova:(on losing 2nd set after leading 5-1)

"Yeah, felt like I took my foot off the gas. Started the second set aggressive in the court forcing her to go for a little much, and then felt like I backed up a little bit, gave her more time..."

SOUNDBITE (English) Agnieszka Radwanska, beat Garbine Muguruza 6-7 (5-7) 6-3 7-5:(key to her win)

"... There was just tight matches. I think in the really important moments you can really use your chance because that's how it is in those kind of matches. "

SOUNDBITE (English) Garbine Muguruza, lost 6-7 (5-7) 6-3 7-5 to Agnieszka Radwanska:

"Yeah, I think in the first set, like I kind of give it all, and then it was hard for me to start the second one. But, well, I just wanted to give everything I had..."

SOUNDBITE (English) Martina Hingis:(on the match)

"I felt very fortunate to have Sania on my side because she's an incredible positive person. You know, like when I get myself down. And in the last couple days I wasn't feeling.... I'm not really a morning person, so she was out there and kept fighting and kept keeping me up there. That's why we were able to come back. Once I felt better, that's when everything start to click. They're a great team, so..."