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Stanislas Wawrinka of Switzerland celebrates defeating Novak Djokovic of Serbia in their men's singles quarter-final tennis match at the Australian Open 2014 tennis tournament in Melbourne | Sportguide - führt Dich durch
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Roger Federer of Switzerland in his second round match against Noah Rubin of the United States on day three of the 20… | Roger federer, How to play tennis, Tennis
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Martina Hingis of Switzerland shows her joy after she defeats Venus... Nachrichtenfoto - Getty Images
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Martina Hingis of Switzerland in action during the Australian Open 2001 second round match played at Melbourne Park, … | Martina hingis, Sport frauen, Tennisspieler
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