Regazzoni first started competing in car races in 1963, at the comparatively late age of 24. Many of his early motorsport experiences were across the border in Italy, Switzerland having banned motor racing following the horrific accident at the 1955 24 Hours of Le Mans race. His first outings were in his own Austin-Healey Sprite, with which he took two podium finishes from only his first three races. This instant success encouraged Regazzoni to move up to a Mini Cooper for the 1964 club racing season.