The Swiss brand On Running has tailored a high-performance tennis sneaker to the needs of Roger Federer, who tried it out at the 2021 Qatar Open (Federer was upset in the quarterfinals). THE ROGER Pro, as it is called, has a “stable midsole of high-performing foam,” a “midfoot cage for precision of foot placement” and a “rounded sole to support smooth transitions between strokes,” as well as a carbon-fiber plate, called the Speedboard, between the midsole and upper. The shoe is not available for sale but is said to be a foundation for a forthcoming range of shoe sold under the THE ROGER label to include the Centre Court, Clubhouse and Advantage models. The Swiss tennis champion is an ambassador of the brand and a minority investor in On Running.