🎾 Correct! The French Open, also known as Roland Garros, is the only Grand Slam tournament played on clay courts. Held annually in Paris, France, the tournament is famous for its red clay surface, which slows down the ball and produces long, grueling rallies. Clay courts test a player’s endurance, patience, and tactical skill, making it one of the most physically demanding tournaments on the tennis calendar. Rafael Nadal has become synonymous with Roland Garros, having won a record number of titles there, thanks to his incredible movement and topspin-heavy game that thrives on clay. The French Open is steeped in history, elegance, and European flair, and it stands out as the only major played on this unique surface. That makes it the correct answer here.