Serena Williams revealed that her iconic grunt during tennis matches was inspired by Monica Seles, a former tennis star she admired. Williams discussed how the grunt became a natural part of her play and a form of breathing during intense moments. This revelation came during her appearance on 'Hot Ones,' a show where celebrities eat spicy wings while answering questions. Williams also humorously imitated Seles' grunt, highlighting the impact of her childhood idol on her own playing style and career.