The image of a tearful Roger Federer sitting alongside his great rival Rafael Nadal as he contemplated the final moments of his professional career went viral in 2022. It marked the end of a 24-year career in which the Swiss legend claimed 20 Grand Slam singles titles, including an all-time men’s record of eight Wimbledon trophies. Federer was the first of the ‘Big Four’—Federer, Nadal, Novak Djokovic, and Andy Murray—to retire, signaling the gradual close of one of the greatest eras in tennis.