Roland-Garros players are free to dress as they wish, despite the controversy surrounding Serena Williams' outfit for the 2018 edition. Wimbledon's dress code could be changed as early as 2023 to no longer be required to dress in white for under-waist clothing.
Article 7 of the FFT regulations indicates that "players must wear clothing compatible with the practice of tennis", but specifies that "each competition organizer may define specific provisions concerning the players' clothing, in compliance with the framework defined in the paragraphs"