In her on-court interview after the win, Williams explained the look. I was different to Venus: "she was thin and tall and attractive, and I am strong and muscular - and handsome, but, you know, it was just totally different".
"If I wasn't playing tennis, I'd be pregnant right now - sorry, I'm one of those women", she said.
In addition to showing off her insanely fit physique, the full-length black bodysuit is created to help protect against blood cots and serve up (no pun intended) serious superhero vibes. "It definitely has little functionality to it".
In an Instagram following the match, Williams dedicated her first time back on the court to all the moms out there.
The 36-year-old added: "I'm always living in a fantasy world".
The suit is, however, not only fun but also functional.
Williams then trailed 0/3 before eventually taking the set when Pliskova, who had never won a match at the tournament in three previous visits, put a forehand wide. Britain's Daily Mail described the outfit as adhering to her "like clingfilm, emphasising every astonishing body contour".
"I actually breast fed for a really, really, really long time, and so I just had this real connection with my daughter".
Williams is 451st on the WTA rankings and while playing under a protected ranking she was not seeded for the French. So I was just winging it in the last minute.
The tennis star was forced to undergo an emergency caesarean and had surgery for blood clots in her lungs during the birth of Alexis Olympia Ohanian Jr in September previous year - her first child with husband Alexis Ohanian, who she married in Rome just 11 weeks later. "It's really fun", she said, referencing the fictional nation at the centre of the Black Panther blockbuster movie. Serena won 82 percent of her total service points despite struggling with her second serve, and she had just 25 unforced errors. "But I think money goes to charity, so donate!"
'It was comfortable. I tried it on a couple of times before. I nearly died. But now, she's the reason why this all means even more than it did before.
"The biggest difference is definitely I'm semi on time today", she continued. It was a solid performance from Barty, who came into this tournament dealing with a back issue that forced her to retire in the middle of the Internationaux de Strasbourg.