 The biggest complaint, however, was that metal rackets caused strong cases of tennis elbow, especially the kind that had holes for the strings directly in the frame, rather than using an external wire wrapper, as in the T-2000.Because of that drawback in particular, most of the top players still preferred to use wooden frames.By 1975, aluminum construction improvements allowed for the introduction of the first American "oversized" racket, which was manufactured by Weed.