PARIS — No one turns the tennis court into a catwalk quite like Naomi Osaka.At the French Open Tuesday, the four-time Grand Slam champion staged an outfit reveal once again, striding out for her first-round match against Germany’s Laura Siegemund wearing a black corset and matching pleated, cascading skirt that skimmed over the clay. They were layered over a gold dress designed by Nike, striped with sequins which shimmered and sparkled in the sunshine in Paris.In an Instagram post, Osaka said the outfit was designed by Kevin Germanier, a couturier who works with upcycled materials.The Nike dress glittered so much in the bright afternoon sun it looked more like a figure skating outfit than the average tennis getup. Fitting for Osaka, who has never had a taste for average when it comes to fashion.Naomi Osaka’s latest Grand Slam fashion statement sparkled in the Paris sun. (David Molton / Picture Alliance)The 28-year-old has been debuting high-fashion outfits at Grand Slams for years, but she set a particularly high bar at the Australian Open in January, when she walked out for her first-round match in a dreamy, dramatic ensemble by couturier Robert Wun that was meant to evoke jellyfish.The outfit was again in two parts. On court, Osaka wore a blue-and-green Nike dress streaked with vertical ruffles. For her entrance, she wore clothes and accessories designed by Wun: a pleated white skirt, matching flowy trousers, a veiled, white-brimmed hat and a parasol. Osaka’s look took over cultural discourse far beyond her match.She continued her run of custom Nike kits with couture accessories and accents at the BNP Paribas Open at Indian Wells, when she came on court in a tribal-inspired look with jewelry adorning her lips, nose and ears that complimented a black mesh and cheetah-print Nike dress. With her cheetah-print sneakers and matching jacket, she looked at home in the desert.For Osaka, blending high fashion into her day job is both a crucial form of self-expression and homage. She’s so engaged in the world of fashion these days that she even took a quick trip across the Atlantic to attend the Met Gala in New York, between the Madrid and Italian Opens.“I feel like fashion, for me, I tell people, I don’t talk a lot, so that way I can talk through my clothes. That means I can be as loud with colors or patterns or fabric as I want,” Osaka said in a news conference at the French Open.“That’s the fun part, you know. I feel like we lost that a little in tennis. I always tell people I grew up with Serena’s and Venus’s grand reveals. I literally can look at a picture and probably tell you what year that outfit came from.“I know there are some kids or some people that are similar to me that hopefully feel that same way about my outfits. But, yeah, I am a little dramatic when it comes to my fashion sense.”Tuesday’s outfit was less striking than her Australian Open look, and as she removed her black vest and overskirt, Osaka reached for a plain black Nike visor — business-like, as she aims to make it past the third round of the French Open for the first time in her career. Osaka last reached that stage in 2019.