Gauff beats Osaka in Australian Open straight sets

twitter/(@CocoGauff)

Coco Gauff has stunned defending champion Naoimi Osaka in straight sets in the Australian Open.

She has now reached the fourth round of the competition in Melbourne. 

The 15-year-old American teenager won 6-3 6-4. 

She completed the match in 67 minutes and will be playing either China's Zhang Shaui or fellow American Sofia Kenin in the next round. 

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