The R-22 was the first tennis racquet with an isometric head shape, increasing the size of the cross-section and creating a larger sweet spot. In 1984, Navratilova used it to win Roland Garros ...

Tim Newcomb covers tennis gear/business ... features a box frame shaft and a reverse R-shaped cross-sectional structure to specialize in racket flex. In contrast, the VCore has a box frame ...

The combination of the increased stiffness of modern rackets and the tendency for tennis balls to have become harder has led to an increased shock transmission from the racket to the player, which is ...