Radwanska claims WTA Finals crown; Federer edges Nadal in Basel

    Updated 2232 GMT (0632 HKT) November 1, 2015

    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.
    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.
    Hide Caption
    1 of 29
    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.
    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.
    Hide Caption
    2 of 29
    Sharapova of Russia looks dejected after slipping to a shock defeat to Kvitova in the semifinals.
    Photos: Radwanska takes WTA Finals crown
    Sharapova of Russia looks dejected after slipping to a shock defeat to Kvitova in the semifinals.
    Hide Caption
    3 of 29
    Radwanska ended the hopes of Spain's Garbine Muguruza in the semifinals at the WTA Finals.
    Photos: Radwanska takes WTA Finals crown
    Radwanska ended the hopes of Spain's Garbine Muguruza in the semifinals at the WTA Finals.
    Hide Caption
    4 of 29
    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.
    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.
    Hide Caption
    5 of 29
    But it wasn't all bad news for Kvitova, the two-time Wimbledon champion ...
    Photos: Radwanska takes WTA Finals crown
    Day Six – But it wasn't all bad news for Kvitova, the two-time Wimbledon champion ...
    Hide Caption
    6 of 29
    She joined Muguruza in the last four when Lucie Safarova, pictured, topped Angelique Kerber in straight sets, 6-4 6-3.
    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.
    Hide Caption
    7 of 29
    Kerber's week began well when she downed Kvitova but then the German lost to Muguruza and Safarova.
    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.
    Hide Caption
    8 of 29
    In Saturday's semifinals, Sharapova, pictured, played Kvitova and Muguruza faces Radwanska.
    Photos: Radwanska takes WTA Finals crown
    Day Six – In Saturday's semifinals, Sharapova, pictured, played Kvitova and Muguruza faces Radwanska.
    Hide Caption
    9 of 29
    That about sums it up for Simona Halep. She lost to Radwanska on Thursday and was eliminated at the WTA Finals.
    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.
    Hide Caption
    10 of 29
    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.
    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.
    Hide Caption
    11 of 29
    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.
    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.
    Hide Caption
    12 of 29
    Sharapova finished at 3-0 in the Red Group and progressed with Radwanska. Pennetta, meanwhile, played the final match of her career.
    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.
    Hide Caption
    13 of 29