Rule 1.4 Points and outs

Points are scored by the serving side when it serves an ace (a serve which is untouched by the receiver’s hand) or wins a rally (except as provided by Rule 3.4.D.4.b, Late start.) When the serving side loses one rally in singles or two rallies in doubles, it loses the serve (except as provided by Rule 4.2.A, Server.) Losing the serve is called an “out.”