A court infraction is an illegal or improper action that takes place on a court, such as a tennis court. FOUL is a four-letter word that describes an act that violates the rules of the game, such as hitting the ball before it has crossed the net. Footfault is a nine-letter word that describes when a player steps on or over the baseline while serving. Doublefault is an eleven-letter word that describes when a player commits two consecutive faults during a single point. All of these terms are examples of court infractions.