Abstract: A tennis racket exercise weight assembly, readily secured to and removed from the strings traversing the head of a cooperating tennis racket, opposing elements of which are clamped to a racket for use to assist in developing the particular muscles required to hold and swing a tennis racket in the manner in which the racket is used in playing the game of tennis and particularly useful in combination with a cooperating tennis racket with its head and the exercise weight assembly clamped thereto enclosed within a correspondingly shaped closely fitted substantially air impervious racket cover of the conventional well-known type.