A foot fault is a term used in the context of court sports, such as tennis and badminton. It refers to when a player’s feet touch outside of the court boundaries during service, which results in an automatic point loss for that player. Generally speaking, most courts require players to keep their feet behind and inside the baseline while serving; if any part of either foot touches beyond this line before contact with the ball occurs, then it will be called a foot fault. There are some minor exceptions to this rule; for example, in some tournaments or events players may be allowed to have one foot touching outside of the baseline before contact with the ball. However these rules vary by tournament and should always be clarified before play begins between both opponents.