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Agnieszka Radwanska won the biggest title of her career on Sunday as she downed two-time Wimbledon champion Petra Kvitova 6-2, 4-6, 6-3 to win the WTA Finals in Singapore. (Petra Kvitova to face Agnieszka Radwanska in the final)
Radwanska, who lost twice at the round-robin stage and upset Garbine Muguruza in the semis, came from a break down in the deciding set to win a tense final in two hours and five minutes.
The 26-year-old Pole, who was a last-minute qualifier for the eight-player season finale, was in floods of tears after winning the prestigious title at her seventh attempt.
"It just means everything -- it was my first final and it couldn't have been any better," she said.
Radwanska dominated the first set but Kvitova hit back to win the second and take it to a decider at an increasingly tense Singapore Indoor Stadium.
The Pole went down a break early in the third but she snatched back control and saw off a gritty fightback by Kvitova, who was hampered by an injury to her heavily strapped right leg.