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Switzerland's Timea Bacsinszky plays a forehand return to Spain's Garbine Muguruza during their women's singles match on day six of the Australian Open tennis tournament in Melbourne on January 19, 2019. (Photo by Paul Crock / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE -- (Photo credit should read PAUL CROCK/AFP/Getty Images)

Switzerland's Timea Bacsinszky plays a forehand return to Spain's Garbine Muguruza during their women's singles match on day six of the Australian Open tennis tournament in Melbourne on January 19, 2019. (Photo by Paul Crock / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --        (Photo credit should read PAUL CROCK/AFP/Getty Images)