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Naomi Osaka of Japan is congratulated by Antonia Ruzic of Croatia following their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
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Naomi Osaka of Japan plays a backhand return to Antonia Ruzic of Croatia during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
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Antonia Ruzic of Croatia plays a forehand return to Naomi Osaka of Japan during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo; AP/Asanka Brendon Ratnayake
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Naomi Osaka of Japan plays a forehand return to Antonia Ruzic of Croatia during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
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Antonia Ruzic of Croatia plays a forehand return to Naomi Osaka of Japan during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
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Naomi Osaka of Japan reacts during her first round match against Antonia Ruzic of Croatia at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
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Naomi Osaka of Japan plays a forehand return to Antonia Ruzic of Croatia during their first round match at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
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Naomi Osaka of Japan walks onto Rod Laver Arena for her first round match against Antonia Ruzic of Croatia at the Australian Open tennis championship in Melbourne, Australia. | Photo: AP/Asanka Brendon Ratnayake
