Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena. Left: Maria Sharapova's trainer Sven Groeneveld.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena. Left: Maria Sharapova's trainer Sven Groeneveld.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena. Left: Maria Sharapova's trainer Sven Groeneveld.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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Russian tennis player Maria Sharapova during a training session at Porsche Arena.

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