The US Open is one of the four Grand Slam tournaments and takes place on hard courts at the USTA Billie Jean King National Tennis Center in New York. Known for its energy, night matches, and rowdy crowds, it’s one of the most entertaining events on the tennis calendar. However, the US Open is not played on clay—it uses DecoTurf, a type of acrylic hard surface. Hard courts provide a balanced speed and bounce, but if you’re looking for the only major played on clay, this isn’t the one.