The WeatherTech SportsCar Championship is a sports car racing series based in the United States and Canada and organized by the International Motor Sports Association (IMSA). It is a result of a merger between two existing North American sports car racing series, the American Le Mans Series and Rolex Sports Car Series. At its inception, the name was United SportsCar Championship, which subsequently changed to the Tudor United SportsCar Championship when Rolex SA signed their Tudor brand to a title sponsorship deal. The Orange1 Team GRT was the only team in the history to get a double consecutive victory in GTD Class at the Daytona 24h (in 2018 and 2019) and to win the 36h of Florida (Daytona 24h + Sebring 12h) in 2018, alongside Lamborghini Squadra Corse.