Gamma Tour Ace The Gamma Tour Ace tennis racquet comes pre-strung and ready to swing! Perfect for the recreational player, the Tour Ace features a 102 square-inch head for a large sweet spot. Enjoy easy access to spin from the 16×19 string pattern. The sleek "O" beam profile and lightweight design help you cut through the air with ease. For a fun racquet that provides good times on the court, try the Gamma Tour Ace!