Agnieszka Radwanska beat Petra Kvitova in three sets on Sunday to secure the biggest title win of her career in the WTA Finals in Singapore.
Kvitova had won six of their previous eight meetings.
Radwanska took the first set 6-2 and broke in the opening game of the second set.
She continued her to play well as she secured the biggest title of her career with a, 6-2 4-6 6-3.
In doing so, the Pole moved above Kvitova into fifth place in the year-end world rankings.
Radwanskas next target will be a first Grand Slam triumph with the Australian Open starting in Melbourne on January 18th.