NEW YORK — Naomi Osaka has taken the first set against Coco Gauff by a 6-3 score in their much-anticipated matchup in the U.S. Open's fourth round on Monday.

Gauff made 16 unforced errors in that set, while a consistent and confident Osaka made just five.

Gauff , a 21-year-old from Florida, is the Grand Slam tournament's No. 3 seed. Osaka , a 27-year-old who was born in Japan and moved to the U.S. with her family at age 3, is the No. 23 seed.

They have won a combined three titles at Flushing Meadows.

Monday's winner will make it to this year's quarterfinals and face No. 11 Karolina Muchova or No. 27 Marta Kostyuk.

The match is being held in Arthur Ashe Stadium. It began after Felix Auger-Aliassime of Canada beat Andrey Rublev of Russia there in the fourth round of the men’s

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