Serena Williams caused a sensation with the black catsuit she wore at this year's French Open tournament. But French tennis officials aren't as fashion-forward. From now on, players' attire apparently will be subject to a dress code â and Williams' sleek outfit is out. "I feel like a warrior in it, a warrior princess ... from Wakanda, maybe," she told reporters in May, referring to the movie Black Panther. "I've always wanted to be a superhero, and it's kind of my way of being a superhero."