The primary surface for most tennis tournaments is hard court, specifically made from a mixture of acrylic materials and concrete or asphalt. Hard courts provide a good balance for players as they allow for a fast game with predictable bounces. They are durable and require less maintenance than grass or clay courts. Major tournaments, like the US Open and the Australian Open, are hosted on hard courts, enhancing the sport's popularity as they cater to a wide range of playing styles.