PARIS (CNN) – She had been away from grand slams for 16 months, but Serena Williams said that she felt like “a warrior princess” as she returned to her winning ways at the French Open on Tuesday.

The 36-year-old player defeated Kristyna Pliskova 7-6 (7-4) 6-4 in her first grand slam match since becoming a mom, but it was her eye-catching black catsuit that had tongues wagging. Laughing as she made reference to the fictional nation which is home to superhero Black Panther from Marvel Comics, Williams told reporters, “I feel like a warrior in it, like a warrior princess, a queen from Wakanda maybe.”

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“It was comfortable to wear,” Williams added. “I’m always living in a fantasy world. I always wanted to be a superhero, and it’s kind of my way of being a superhero. I feel like a superhero when I wear it.”

Serena Williams

Serena Williams plays during her first round match against Kristyna Pliskova of the Czech Republic during the 2018 French Open at Roland Garros on May 29, 2018 in Paris, France. (credit: Matthew Stockman/Getty Images)

The skintight outfit also serves a serious purpose, helping the 23-time grand slam champion’s blood circulation after a difficult childbirth.

In an opinion piece for CNN in February, the former world No. 1 described how she almost died while giving birth to her daughter, Olympia, in September. Williams added, “I had a lot of problems with my blood clots. God, I don’t know how many I have had in the past 12 months. So there is definitely a little functionality to it.”

“I have been wearing pants a lot when I play so I can keep the blood circulation going,” Williams said.

Though she is the most successful female player of the open era, with a ranking at No. 451 in the world, she is not seeded in Roland Garros.

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Hitting 13 aces and lifting her game when trailing in a first-set tiebreak, the American overcame a player 381 places above her in the rankings in 1 hour and 45 minutes. Australian Ashleigh Barty awaits her in the second round.

In an Instagram post after her victory — her first match on clay since the 2016 French Open final — Williams wrote, “Catsuit anyone? For all the moms out there who had a tough recovery from pregnancy — here you go. If I can do it, so can you. Love you all!!”

Williams, who won the 2017 Australian Open in the early stages of pregnancy, told reporters that she felt she was “on the right track.”

“I have been putting a lot of work in on the court, off the court, on the court, on the court, off the court, that’s kind of been my life,” said Williams, who had arrived at the French Open on a two-match losing skid and with no warmup matches on clay. “I have been really enjoying it. Hopefully the results continue to show.”

Williams’ tiebreak against fellow big server Pliskova — twin sister of former No. 1 Karolina Pliskova, who beat Serena at the 2016 U.S. Open — felt decisive. The world No. 70 saved the lone break point of the first on Philippe-Chatrier court, a set point, at 5-6 with an ace. As a result, the Czech held the momentum going into the tiebreak and duly raced to a 3-0 advantage.

A combination of factors changed the complexion. Williams refused to donate any errors while Pliskova blinked, perhaps realizing how close she was to taking a set off the tennis great. Pliskova regrouped for 2-0 in the second set but didn’t recover when broken from 40-15 in the ensuing game, although Williams needed to save a trio of break points to confirm her passage into the second round.

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