The official rules of table tennis are summarized as follows: 1) Games are played to 11 points with a two point margin of victory required. A match consists of the best three out of five games. 2) Serves alternate every two points with service changing on every point once a game reaches deuce at 10-10. 3) The ball must be tossed straight up and struck on the way down during serves, which can land anywhere in singles but must land in the right courts in doubles. 4) Lets are called if a serve touches the net on the way over, volleys are not allowed, and the ball can be hit with the paddle hand but not other parts of the body.