According to People magazine, the tennis champion played at this year’s US Open in a custom Nike set designed by Williams with a “hands-on approach.”

“Inspired by graceful competition dresses worn by figure skaters, the embellished bodice and the skirt place Serena in the spotlight and allow her freedom of movement,” the brand noted of the outfit’s details in a statement, the outlet reported.

The skirt also holds symbolic meaning as it is built with six layers that honour Williams’ “six previous title wins in Flushing.” The set’s matching jacket and tote bag splashed in a deep midnight hue, and its light-refracting “crystal-encrusted bodice” mirrored the starry night sky, under which Williams played her match against Montenegro’s Danka Kovinic on Monday evening.

The 23-time Grand Slam winner took the court in a pair of custom NikeCourt Flare 2 sneakers, featuring a “diamond-encrusted Swoosh design and her initials on the medial side” as well as gold lace deubres decorated with “400 hand-set diamonds in black ceramic created in collaboration with Serena Williams Jewelry,” reported People magazine.