After kicking things off like this, Osaka’s sartorial arrangements for the rest of the Open are pretty much appointment viewing. Her next match is on Thursday against Czech competitor Karolina Muchova. Osaka entered the tournament ranked 88th in the world, as she’s still working her way back into form after missing all of last year’s Grand Slams on maternity leave. (Her first child, a daughter named Shai, was born in July 2023.) Since returning to the sport in January, she hasn’t advanced past the second round in any of the first three major tournaments on the 2024 calendar. But if her debut at this year’s US Open is any indication, both tennis and fashion-wise, she stands to make a serious mark at the season’s final major.