Atari’s original tennis game was a lot simpler than later versions. There are no foul balls, for instance, and boundaries are simplified in this game. This requires the code to have complete control over where the ball goes, and how high it goes, since there are no foul balls or net balls. The game is divided into six sets, with the players alternating their position in each set. Scoring is a bit complicated, in order to win a set a player requires a minimum of two point advantage over its opponent.