Abstract: A tennis court has an upright net and a pair of laterally relative fair service areas. Upright posts are anchored adjacent and extend above the ends of the court net. An elongated rectangular practice serving net overlies, is coplanar with and engages the court net. The serving net inwardly of its ends and below its top is cut away defining an elongated rectantular opening above the court net adjacent the fair service areas. An upright divider post is arranged intermediately of the ends of the practice serving net extending the height thereof dividing the rectangular opening into a pair of rectangular openings. A pair of curtains of net material are coplanar with the serving net and at their top edges are connected thereto and depend into the pair of openings respectively. The lower edges of said curtains are adjustably spaced above said court net providing a pair of elongated adjustable height service apertures for receiving served tennis balls so as to fall within said fair service areas.