Formula 1, also known as Formula One or F1, is the highest class of single seater auto racing governed by the FIA. It consists of a series of races known as Grands Prix held on circuits around the world. The results are combined to determine annual World Championships for both drivers and constructors. F1 cars must comply with regulations regarding their construction, engines, and other components to ensure competition. Popular Grands Prix are held in various countries from March to November each year. Legendary drivers like Juan Manuel Fangio, Ayrton Senna, Michael Schumacher, and the current champion Sebastian Vettel have dominated the sport over the decades.