Naomi Osaka is back in the third round of the U.S. Open for the first time since 2021, the year after she won her second championship at Flushing Meadows

Naomi Osaka and Coco Gauff will meet in the fourth round on Monday night. And it's more of a toss-up than recent results suggest.

Gauff and Osaka, who last met in 2019, will reunite on the hard court Monday with a quarterfinal berth at stake.