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Garbine Muguruza of Spain returns the ball to Venus Williams of US during the WTA Tennis Open tournament in Rome at the Foro Italico, on May 19, 2017. / AFP PHOTO / TIZIANA FABI (Photo credit should read TIZIANA FABI/AFP via Getty Images)

Garbine Muguruza of Spain returns the ball to Venus Williams of US during the WTA Tennis Open tournament in Rome at the Foro Italico, on May 19, 2017.  / AFP PHOTO / TIZIANA FABI        (Photo credit should read TIZIANA FABI/AFP via Getty Images)

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Garbine Muguruza of Spain returns the ball to Venus Williams of US during the WTA Tennis Open tournament in Rome at the Foro Italico, on May 19, 2017. / AFP PHOTO / TIZIANA FABI (Photo credit should read TIZIANA FABI/AFP via Getty Images)

Garbine Muguruza of Spain returns the ball to Venus Williams of US during the WTA Tennis Open tournament in Rome at the Foro Italico, on May 19, 2017.  / AFP PHOTO / TIZIANA FABI        (Photo credit should read TIZIANA FABI/AFP via Getty Images)

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Garbine Muguruza of Spain returns the ball to Venus Williams of US during the WTA Tennis Open tournament in Rome at the Foro Italico, on May 19, 2017. / AFP PHOTO / TIZIANA FABI (Photo credit should read TIZIANA FABI/AFP via Getty Images)

Garbine Muguruza of Spain returns the ball to Venus Williams of US during the WTA Tennis Open tournament in Rome at the Foro Italico, on May 19, 2017.  / AFP PHOTO / TIZIANA FABI        (Photo credit should read TIZIANA FABI/AFP via Getty Images)