Abstract: Disclosed is a device for aiding a student of tennis in perfecting his serve. The device consists of a frame which supports an overhead target, and a cooperating ground surface target. The overhead target is movably mounted and adjustable in height so that its lowermost surface can be readily placed at the optimum toss height for the user's serve and it will move when struck to indicate an overtoss. It has a visible target pattern thereon related to a pattern on the ground target, which is positioned directly under the overhead target so that a straight dropping tossed ball will strike a like position on both targets. The overhead target also has depending strike height markers to indicate the desired height at which a toss serve ball should be struck with the racquet.