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Viktorija Golubic of Switzerland hits a return against Timea Babos of Hungary during their first session women's singles match on day one of the ATP Cup Adelaide International tennis tournament in Adelaide on January 12, 2020. (Photo by Brenton EDWARDS / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE -- (Photo by BRENTON EDWARDS/AFP via Getty Images)

Viktorija Golubic of Switzerland hits a return against Timea Babos of Hungary during their first session women's singles match on day one of the ATP Cup Adelaide International tennis tournament in Adelaide on January 12, 2020. (Photo by Brenton EDWARDS / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE -- (Photo by BRENTON EDWARDS/AFP via Getty Images)