A1 Grand Prix (A1GP) was a single make open wheel auto racing series. It was unique in its field in that competitors solely represented their nation as opposed to themselves or a team, the usual format in most formula racing series. As such, it was often promoted as the "World Cup of Motorsport". The series was ratified by the Fédération Internationale de l'Automobile (FIA) and races were held in the traditional Formula One off-season.