The Sierra Leone National Premier League is the top professional football league in Sierra Leone and is controlled by the Sierra Leone Football Association. Fourteen clubs from across the country compete in the Sierra Leone Premier League. The two biggest and most successful football clubs are East End Lions and Mighty Blackpool. East End Lions and Mighty Blackpool have an intense rivalry and when they play each other the national stadium in Freetown is often sold out and supporters of both clubs often clash with each other before and after the game. There is a huge police presence inside and outside the national stadium during a match between the two great rivals to prevent a clash. Many Sierra Leonean youth follow the local football league.