I was watching the '84 French final last night and was struck by the technical similarities between the Lendl "bolo" forehand and the ultra-modern attacking whip forehand that Federer has used to dominate tennis. Also, one also sees similar technique on the forehand from Djokovic and Verdasco, the other two big forehands in the game today. The key to unleashing the power and pace of this shot is opening the chest/shoulders before the shot and whipping the arm through after this initial rotation from the upper body. Lendl did the very same thing with his bolo forehand. It was the thing that allowed him to "crack" the shot, just as Federer cracks his forehands. About the only real difference in the Lendl and Fed strokes is that Lendl seems to drop his racquet head further below the level of the ball before the strike. And Lendl probably does not use a totally open stance so often the way Fed and the other current players do. A more closed stance is probably what gives it the "bolo" look rather than the whip look of Federer. Watch Lendl, Fed, Verdasco and Djokovic. They all take the racquet back very much alike. The wrist is not so firm as in a normal forehand. The chest opens and the arm cracks through much like a whip. When playing a safe rally forehand, Djokovic often reverts to the safer windshield wiper stroke (that Borg perfected) and that came to dominate clay-court tennis during the late 90s and that is still used by many players today. Robredo's forehand comes to mind: solid and reliable, but lacks killer sting. Same for JC Ferrero and David Ferrer. But the great killer forehands of today are pretty much variations of the great Lendl forehand, the shot he used to dominate the game for a decade. In summation, there are two ways to hit a forehand in today's modern game. Borg is the innovator of the basic winshieldwiper topspin rally shot, and Lendl is the innovator of the killer forehand whip shot.