English Scoring Rules
In the traditional, British system you can only score points when you are serving. When the player, receiving serve wins a rally, the score does not change, but he or she becomes the server. So if you are facing serve, you need to win two
rallies to register a point.
A match is the best of five games, and for a player to win a game they must reach nine points. If the score reaches eight-all, however, the player who is not serving at the time can choose whether to play to nine points or to 10 points.
American Scoring Rules
Another format which can be fun and is becoming more used across the world is point a rally scoring. Players score a point when they win a rally regardless of who serves the ball.
A match is the best of five games, and for a player to win a game they must reach eleven points. If the score reaches ten-all, however, either player can only win the game if they achieve two clear points e.g. 12-10 or 18-16.