Tennis is a sports game released in Japan for the Family Computer in 1984, and in North America for the Nintendo Entertainment System in 1985. In North America, Tennis was one of 18 launch games for the NES. A Game Boy version was also released. The game features single-player and two-player modes for singles and doubles matches, with either competitive or cooperative gameplay. A computerized opponent's artificial intelligence can be set to one of five difficulty levels. Mario referees the matches.