A badminton match lasts until one side wins two out of three games. Games are played to 21 points, with one point awarded for each "rally," which begins with a serve. There is no time limit for individual games or the match as a whole.
Each game of the best-of three series must be won by at least two points, up to a maximum of 30. For example, a game tied 20-20 is not over until Team A or B scores consecutive points. To prevent games from dragging on, if the score remains tied at 29, the next point scored determines the winner.