Radwanska claims WTA Finals crown; Federer edges Nadal in Basel

Photos: Radwanska takes WTA Finals crown
Agnieszka Radwanska of Poland holds aloft the Billie Jean King Trophy after defeating Petra Kvitova of Czech Republic in the title match of the WTA Finals.
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Photos: Radwanska takes WTA Finals crown
Kvitova of Czech Republic reacts to a point against Maria Sharapova in the way to a surprise victory over the Russian in the WTA Finals.
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Photos: Radwanska takes WTA Finals crown
Sharapova of Russia looks dejected after slipping to a shock defeat to Kvitova in the semifinals.
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Photos: Radwanska takes WTA Finals crown
Radwanska ended the hopes of Spain's Garbine Muguruza in the semifinals at the WTA Finals.
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Photos: Radwanska takes WTA Finals crown
Day Six – Muguruza beat Kvitova 6-4 4-6 7-5 at the WTA Finals in Singapore to win the White Group and progress to the semifinals.
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Photos: Radwanska takes WTA Finals crown
Day Six – But it wasn't all bad news for Kvitova, the two-time Wimbledon champion ...
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Photos: Radwanska takes WTA Finals crown
Day Six – She joined Muguruza in the last four when Lucie Safarova, pictured, topped Angelique Kerber in straight sets, 6-4 6-3.
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Photos: Radwanska takes WTA Finals crown
Day Six – Kerber's week began well when she downed Kvitova but then the German lost to Muguruza and Safarova.
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Photos: Radwanska takes WTA Finals crown
Day Six – In Saturday's semifinals, Sharapova, pictured, played Kvitova and Muguruza faces Radwanska.
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Photos: Radwanska takes WTA Finals crown
Day Five – That about sums it up for Simona Halep. She lost to Radwanska on Thursday and was eliminated at the WTA Finals.
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Photos: Radwanska takes WTA Finals crown
Day Five – A frustrated Halep, seen here with coach Darren Cahill, fell 7-6 (7-5) 6-1. The Romanian was the highest ranked player in the field at No. 2.
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Photos: Radwanska takes WTA Finals crown
Day Five – Sharapova knew she made the semifinals even before she played Flavia Pennetta but still beat the Italian 7-5 6-1, rallying from 4-2 down in the first.
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Photos: Radwanska takes WTA Finals crown
Day Five – Sharapova finished at 3-0 in the Red Group and progressed with Radwanska. Pennetta, meanwhile, played the final match of her career.
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