Tennis

     Martina Navratilova of the United States in action in in their legends doubles match during day nine of the 2015 Australian Open at Melbourne Park on January 27, 2015 in Melbourne, Australia. (Photo by Patrick Scala/Getty Images)

    Navratilova quits role: 'I'm too busy'

    By Gary Morley, CNN
    Sometimes it can pay off to have a tennis legend in your coaching corner, but sometimes things just don't work out -- as Agnieszka Radwanska has discovered.

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