Naomi Osaka dominates Coco Gauff in straight sets to reach US Open quarterfinals

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Coco Gauff’s run at the 2025 U.S. Open has ended, and it was Naomi Osaka, the Japanese star who won the tournament in 2018 and 2020, who made it happen. 

Osaka, who famously defeated Serena Williams to capture the title in 2018, was playing like she has in the past to reach the top of the women’s singles rankings, defeating Gauff in dominant fashion, 6-3, 6-2, to advance to the quarterfinals in Flushing, New York. 

The No. 23-ranked women’s singles player got off to a roaring start, breaking Gauff in the opening game and continuing to roll from there. 

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Naomi Osaka (JPN) hits to Coco Gauff (USA) (not pictured) on day nine of the 2025 U.S. Open tennis tournament at the USTA Billie Jean King National Tennis Center on Sept. 1, 2025. (Robert Deutsch/Imagn Images)

Gauff struggled to break Osaka herself, as the latter never once faced a break point on her serve throughout the match. Gauff finished the match with an uncharacteristic 33 unforced errors, which ultimately put her in a rut that Osaka took advantage of.

"I was super locked in," Osaka said on the court after her match. "I felt like everyone wanted to watch a really great match and I hope that’s what you got."

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This is Osaka’s first trip to the quarterfinals in a Grand Slam since she won the Australian Open in 2021. She has dealt with mental health struggles in the past, bravely speaking up about them while taking a break from the sport as a result. 

Naomi Osaka hugs Coco Gauff after defeating her at the 2025 U.S. Open at Arthur Ashe