Abstract: The present invention is a knock-down, portable structure enabling the easy and rapid erection of a tennis, badminton or volleyball court on any relatively flat and hard surface. This invention comprises the combination of (i) a dual purpose net; (ii) one or more pairs of poles to which the net is affixed, the length of the pole pair being that commensurate with the required net height; and (iii) structure for stably supporting the pole pair without drilling into the ground surface.