The legend intended to hang up his racket all dressed in sequins.
Serena Williams is participating in her last US Open and for this first match - which could have been the last of her career if she had lost - she gave everything.
Faced with the Montenegrin player, Danka Kovinić, the American champion sported diamonds and dragged worthy of the most beautiful red carpets.
"I don't want to be an athlete and be pregnant anymore": Serena Williams announces retirement and wants a second child
In video, Serena Williams is the star of a committed ad
It is therefore not the number of games (of this match won 6-3, 6-3) that has aroused the most comments, but indeed his outfit.
Even before the first exchanges, Nike, the equipment supplier in charge of dressing him, revealed that his look would be exceptional.
The 40-year-old tennis star wore a train as she took to the court at the USTA's Billie Jean King National Tennis Center in New York City.
From the sports bra to the sneakers, including the skirt, the fishnet top and the train, each piece was black dotted with sparkles.
Inspired by figure skating
“It's no secret that Serena rocks both on and off the court.
When it came to tonight's winning look, the queen of the court wanted something that epitomized the fiery boldness she always serves up,” Nike captioned her Instagram account.
“Serena worked with our design team on a final tournament look that would make her feel comfortable and confident.
This look puts her in the limelight while giving her the freedom to perform her master moves.
The outfitter also revealed that Serena will be dressed in a figure skating-inspired dress, encrusted with diamonds.
On her feet, she wore the NikeCourt Flare 2 tennis sneakers, customized to shine brightly.
For his next match on Wednesday August 31, will the tennis legend arrive in a sun-colored outfit?