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    Radwanska claims WTA Finals crown; Federer edges Nadal in Basel

    Updated 2232 GMT (0632 HKT) November 1, 2015

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    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.
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    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.
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    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.
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    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.
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    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.
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    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 ...
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    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.
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    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.
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    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.
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    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.
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    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.
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    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.
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    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.
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    Kvitova bounced back from her opening defeat at the WTA Finals in Singapore by beating fellow Czech Lucie Safarova 7-5 7-5 on Wednesday.
    Photos: Radwanska takes WTA Finals crown
    Day Four – Kvitova bounced back from her opening defeat at the WTA Finals in Singapore by beating fellow Czech Lucie Safarova 7-5 7-5 on Wednesday.
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    Kvitova has now beaten her friend eight times in a row. Next month they will line up together against Russia in the Fed Cup final, seeking to give the Czech Republic a fourth title in five years.
    Photos: Radwanska takes WTA Finals crown
    Day Four – Kvitova has now beaten her friend eight times in a row. Next month they will line up together against Russia in the Fed Cup final, seeking to give the Czech Republic a fourth title in five years.
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    Kvitova will play unbeaten Spanish second seed Muguruza in her final White Group match. The 22-year-old has two wins from two after beating Angelique Kerber 6-4 6-4 in Wednesday's second match.
    Photos: Radwanska takes WTA Finals crown
    Day Four – Kvitova will play unbeaten Spanish second seed Muguruza in her final White Group match. The 22-year-old has two wins from two after beating Angelique Kerber 6-4 6-4 in Wednesday's second match.
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    Sixth seed Kerber, who would have reached the semis with victory over Muguruza, faces Safarova in her closing match.
    Photos: Radwanska takes WTA Finals crown
    Day Four – Sixth seed Kerber, who would have reached the semis with victory over Muguruza, faces Safarova in her closing match.
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    Sharapova celebrates after beating top seed Halep 6-4 6-4 in their second Red Group round-robin match in Singapore.
    Photos: Radwanska takes WTA Finals crown
    Day Three – Sharapova celebrates after beating top seed Halep 6-4 6-4 in their second Red Group round-robin match in Singapore.
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    Halep could have qualified for the semifinals with victory, but the Romanian lost seven out of eight games from 4-4 in the opening set and the Russian held off her late fightback.
    Photos: Radwanska takes WTA Finals crown
    Day Three – Halep could have qualified for the semifinals with victory, but the Romanian lost seven out of eight games from 4-4 in the opening set and the Russian held off her late fightback.
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    Pennetta signs autographs for fans after defeating Radwanska 7-6 (7-5) 6-4 in Tuesday's earlier Red Group match. Italy's U.S. Open champion kept her semifinal hopes alive ahead of her closing match against Sharapova.
    Photos: Radwanska takes WTA Finals crown
    Day Three – Pennetta signs autographs for fans after defeating Radwanska 7-6 (7-5) 6-4 in Tuesday's earlier Red Group match. Italy's U.S. Open champion kept her semifinal hopes alive ahead of her closing match against Sharapova.
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    Radwanska led 5-3 in the opening set, and the Polish fifth seed saved three match points before her second defeat in three days.
    Photos: Radwanska takes WTA Finals crown
    Day Three – Radwanska led 5-3 in the opening set, and the Polish fifth seed saved three match points before her second defeat in three days.
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    Spain's rising star Muguruza opened her White Group campaign with a 6-3 7-6 (7-4) win against Safarova of the Czech Republic on Monday.
    Photos: Radwanska takes WTA Finals crown
    Day Two – Spain's rising star Muguruza opened her White Group campaign with a 6-3 7-6 (7-4) win against Safarova of the Czech Republic on Monday.
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    Safarova beat the 22-year-old in this year's French Open quarterfinals in their only other meeting, but the world No. 9 was sidelined by a debilitating bacterial infection after her first-round defeat at the U.S. Open.
    Photos: Radwanska takes WTA Finals crown
    Safarova beat the 22-year-old in this year's French Open quarterfinals in their only other meeting, but the world No. 9 was sidelined by a debilitating bacterial infection after her first-round defeat at the U.S. Open.
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    Kvitova, who has also struggled with health issues this year, lost 6-2 7-6 (7-3) to Germany's Angelique Kerber in their opening White Group match.
    Photos: Radwanska takes WTA Finals crown
    Day Two – Kvitova, who has also struggled with health issues this year, lost 6-2 7-6 (7-3) to Germany's Angelique Kerber in their opening White Group match.
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    Kerber had lost her previous four clashes with her fellow left-hander, who won the tournament in 2011 when it was held in Istanbul.
    Photos: Radwanska takes WTA Finals crown
    Kerber had lost her previous four clashes with her fellow left-hander, who won the tournament in 2011 when it was held in Istanbul.
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    Sharapova triumphed against Radwanska on Sunday in her first completed match since the Wimbledon semifinals. The world No. 4 pulled out with an arm injury during her return in Wuhan last month.
    Photos: Radwanska takes WTA Finals crown
    Day One – Sharapova triumphed against Radwanska on Sunday in her first completed match since the Wimbledon semifinals. The world No. 4 pulled out with an arm injury during her return in Wuhan last month.
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    Sharapova battled Radwanska for nearly three hours on Sunday before triumphing 4-6 6-3 6-4.
    Photos: Radwanska takes WTA Finals crown
    Day One – Sharapova battled Radwanska for nearly three hours on Sunday before triumphing 4-6 6-3 6-4.
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    World No. 2 Halep, meanwhile, needed just 70 minutes to thrash Pennetta 6-0 6-3.
    Photos: Radwanska takes WTA Finals crown
    Day One – World No. 2 Halep, meanwhile, needed just 70 minutes to thrash Pennetta 6-0 6-3.
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    Pennetta, who will retire at the end of this season, was unable to regain the form that gave her a straight-sets victory over the 24-year-old in the U.S Open semis.
    Photos: Radwanska takes WTA Finals crown
    Day One – Pennetta, who will retire at the end of this season, was unable to regain the form that gave her a straight-sets victory over the 24-year-old in the U.S Open semis.
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    RadwanskaWTA finals semisWTA finals semis (3)WTA finals semis (2)Muguruza smile Kvitova MuguruzaSafarova forehandKerber stretchSharapova spotlight Halep face Halep Cahill Sharapova winsPennetta last matchkvitova day 4kvitova safarova day 4muguruza day 4kerber day 4sharapova day 3halep day 3pennetta day 3radwanska day 3muguruza day 2safarova day 2kvitova day 2kerber day 2sharapova day 1radwanska day 1halep day 1pennetta day 1

    Story highlights

    • Agnieszka Radwanska claims WTA Finals
    • Beats Petra Kvitova in final
    • Roger Federer takes Basel crown
    • Edges arch rival Rafael Nadal

    (CNN)Poland's Agnieszka Radwanska captured the biggest title of her career Sunday as she beat Petra Kvitova for the WTA Finals crown in Singapore.

    Radwanska prevailed 6-2 4-6 6-3 after a tense battle, claiming the final three games of the deciding set with solid, virtually mistake-free play.
      "It means everything. It couldn't be any better. I think that was the biggest day in my life," she told the official WTA website.
      Radwanska only secured a place in the eight-strong elite field after a late season surge and then went 1-2 in the round robin section to scrape into the semifinals.
      "A few weeks ago I didn't even know I'd have a chance to be here, and there you go. It's just an incredible day for me," she added.
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      A semifinal upset win over Garbine Muguruza of Spain had taken fifth seed Radwanska into the title match, while Kvitova, who also went 1-2 in the round robin, stunned Maria Sharapova.
      Read: Kvitova knocks out Sharapova
      Former Wimbledon champion Kvitova trailed by a set and 2-0 before claiming eight of the next 10 games to level at a set all, but could not maintain that momentum.
      Radwanska made just five unforced errors in the entire match against 41 winners but 53 unforced errors for Czech star Kvitova.
      World number one Serena Williams sat out the end of season finale, while No.2 ranked Simona Halep exited at the group stage after losing to Radwanska in their third match.
      The doubles title went to all-conquering Martina Hingis and Sania Mirza, who beat Muguruza and Carla Suarez Navarro in straight sets.

      Federer's Basel triumph

      Meanwhile, on the ATP Tour there was another knife edge battle between old foes Roger Federer and Rafael Nadal in the final of the Basel Open.
      Federer eventually prevailed 6-3 5-7 6-3 to claim his seventh title at his home town event and secure his first win over his Spanish nemesis in over three years.
      It was his sixth title of an outstanding season for the 34-year-old Swiss, who was claiming the 88th title of his remarkable career.
      Federer finally shrugged off Nadal in the deciding set, improving his record against him on indoor surfaces to 5-1.
      But Nadal is clearly returning to near his best after injury woes and loss of form as acknowledged by Federer.
      "Rafa had a great week," he said.
      "It was special for us to have had this match and I hope we play many more finals.
      "To win this one is incredible, a match with Nadal is always special. It was very important for me."
      Both men are building up to a challenge for the finale of the ATP Tour in London later this month, having already booked their places in the eight-man field.