8.1. Players shall change ends:
8.1.1. at the end of the first game;
8.1.2. at the end of the second game, if there is to be a third game; and
8.1.3. in the third game when a side first scores 11 points, except in Handicap Matches (BWF Statute Section 4.1.3)
8.2. If the ends are not changed as indicated in Law 8.1, it shall be done so as soon as the mistake is discovered and when the shuttle is not in play. The existing score shall stand.