RULES!

Tennis starts by a person throwing a tennis ball into the air and hitting it into the diagonal box on your opponent's side. From there, the players must hit the ball back and forth in a rally, keeping it in the bounds of the court. If the ball bounces on a player's side twice or lands out of bounds, then that counts as a point for the person who last hit it correctly. Points in tennis are counted by 0/Love, 15, 30, 40, and then game. Whoever reaches game first gets one point in a set. In competitive tennis matches, players typically play two sets (sometimes three, if each team wins a set) with six game points inside of them. If a player gets to six game points, they must be in at least a two game point lead in order to win that set.

Sorry, that was a lot of words.