Racquetball is a fast-paced indoor sport played with a hollow rubber ball and a racquet. The game is typically played in a four-walled court, where players take turns hitting the ball against the front wall. The objective is to make the ball bounce in such a way that the opponent cannot return it before it hits the ground twice. Players can compete in singles or doubles matches, and the game emphasizes agility, strategy, and quick reflexes. Scoring can be done using either the traditional hand-in-hand-out system or the rally scoring system, where points can be scored by either player regardless of who served.