One Wall Paddleball

One wall paddleball is an American ball game that consists of hitting a small rubber ball against a single wall by using paddles. It can be played in singles (1 versus 1) or in doubles (2 versus 2). The general rule of the game is that the ball must hit the wall without touching the court floor more than once in order to be a valid rally. Source : https://en.wikipedia.org/wiki/One_wall_paddleball