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Coco Gauff beats defending champ Naomi Osaka in third round of Australian Open

Coco Gauff of the United States celebrates after winning match point during her Women's Singles third round match against Naomi Osaka of Japan day five of the 2020 Australian Open at Melbourne Park on January 24, 2020 in Melbourne, Australia.
Posted at 4:37 AM, Jan 24, 2020
and last updated 2020-01-24 18:43:04-05

MELBOURNE, Australia (AP) -- Delray Beach-native Coco Gauff has beaten defending champion Naomi Osaka 6-3, 6-4 to reach the fourth round of the Australian Open.

It was the second upset with hours on Rod Laver Arena.

Two matches earlier, 23-time major winner Serena Williams was beaten in three sets by Wang Qiang.

The 15-year-old Gauff lost to Osaka at the U.S. Open last year. This time, she was too good.

Osaka has now failed to defend her two major titles at the U.S. Open and in Australia.

Gauff already beat another former No. 1 in the first round this week when she got past Venus Williams.

This is only the third Grand Slam tournament of Gauff's career but already her second time reaching the fourth round.

The moment when rising star @CocoGauff clinched match point against 2019 champion Naomi Osaka.#AO2020 | #AusOpen | @channel9 | @espn pic.twitter.com/zVDOlvNEl8

— #AusOpen (@AustralianOpen) January 24, 2020