What are the official ping pong doubles rules for competitive play?

In competitive ping pong doubles, each team has two players who take turns hitting the ball. The serving team serves first, and the receiving team must return the ball before it bounces twice. Players must alternate hitting the ball and the ball must bounce on the opponent's side before being returned. The first team to reach 11 points wins the game, and a match is typically best out of 5 or 7 games. Players must follow the rules of the International Table Tennis Federation (ITTF) for official competition.