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![Australian Open: 15-Year-Old Coco Gauff Knocks Out Defending Champion Naomi Osaka [Video] 1](https://media.kanyidaily.com/2020/01/24115900/screenshot2020-01-24-11_58_22-364x205.jpg "Australian Open: 15-Year-Old Coco Gauff Knocks Out Defending Champion Naomi Osaka [Video] 1")
