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Ksenia Efremova: 12-year-old Russian tennis prodigy has 'incredible potential,' says Patrick Mouratoglou | CNN
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Ksenia Efremova: 12-year-old Russian tennis prodigy has 'incredible potential,' says Patrick Mouratoglou | CNN
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Ksenia Efremova: 12-year-old Russian tennis prodigy has 'incredible potential,' says Patrick Mouratoglou | CNN
![Ksenia Efremova: 12-year-old Russian tennis prodigy has 'incredible potential,' says Patrick Mouratoglou | CNN Ksenia Efremova: 12-year-old Russian tennis prodigy has 'incredible potential,' says Patrick Mouratoglou | CNN](https://media.cnn.com/api/v1/images/stellar/prod/220114144205-09-tennis-prodigy-ksenia-efremova-011422.jpg?q=h_1180,w_2098,x_0,y_0)