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Forbes.com: The Ten Best Tennis Players Never To Win A Grand Slam Tournament

8 of 11

Agnieszka Radwanksa

WTA Ranking: 3

The 23-year-old Pole has made five Slam quarterfinals, the most recent at this year’s Australian. She’s sponsored by Lotto. (WILLIAM WEST/AFP/Getty Images)

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The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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