15-year-old Coco Gauff summed up her whirlwind journey to stardom after stunning defending champion Naomi Osaka at the Australian Open: 'What is my life?!'

Getty/Hannah Peters

• 15-year-old wunderkind Coco Gauff stunned defending champion Naomi Osaka in the third round of the Australian Open Friday.
• Gauff took down Osaka — who was ranked third in the world prior to the loss — in straight sets to become the youngest woman in the professional era to take down the tournament's reigning champion.
• In her post-match interview, Gauff reflected on her whirlwind journey from losing in the first round of juniors two years ago to taking down tennis greats like Osaka and Venus Williams on the world's biggest stages.  
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Coco Gauff is rolling through the Australian Open.

The 15-year-old wunderkind stunned world No. 3 Naomi Osaka in the third round of the Australian Open Friday to become the youngest woman in the professional era to take down the tournament's reigning champion.See the rest of the story at Business Insider

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• Naomi Osaka apologized for her 'childish' outburst after she threw her racket to the floor after having her serve broken during an Australian Open match
• Tennis player Ajla Tomljanović was asked about her boyfriend at an Australian Open press conference instead of the match she'd just won
• Coco Gauff, 15, just beat Venus Williams for the second time in a year, taking her to the second round of the Australian Open