 He competed at five Olympic Games.Risi was one of the top six-day riders of his generation, he won many professional Madison events during his long career.He is the ninth Swiss sportsperson to compete at five Olympics (1988, 1996/2008), after middle-distance runner Paul Martin, equestrians Henri Chammartin and Gustav Fischer, javelin thrower Urs von Wartburg, equestrian Christine Stückelberger, and Alpine skier Paul Accola, shooter Gabriele Bühlmann, and equestrian Markus Fuchs.