The Game of Tennis

Tennis is a non phyisical sport. You can either have 2 people playing which is called singles or 4 people playing which is called doubles. In singles and doubles you switch sides every third game. A tennis match can go on for two or three days from weather delays. You have to win six games to win one set, oh and just to tell you a game is not one point. You have to win each set by two games, so if your six five up you have to win seven five. If it goes six all, you have to play a tiebreak up to seven win by two. So it could go 11-9 or who knows maby 21-19.