SINGAPORE: Petra Kvitova of the Czech Republic will chase her second WTA Finals title after outplaying third-seeded Maria Sharapova 6-3, 7-6 (3) in the semifinals Saturday. The fourth-seeded Kvitova, who won this title on her first attempt in 2011, plays fifth-seeded Agnieszka Radwanska of Poland in the final. Radwanska advanced to the final for the first time in seven appearances, beating second-seeded Garbine Muguruza of Spain 6-7 (5), 6-3, 7-5. Sharapova had a 5-1 lead in the second set but couldn't push the match into a decisive third set. The Russian served for the second set in the eighth and 10th games, but didn't reach set point in either game.