It is usually contested by 16 clubs, but the 2020–21 season was contested by 20 clubs, because the Football Association of Serbia restructured the league due to the COVID-19 pandemic, operating a system of promotion and relegation with Serbian First League, the second tier in the Serbian football pyramid. The Serbian Super League ( Serbian: Супер лига Србије / Super liga Srbije), referred to as the Mozzart Bet Super League ( Serbian: Моцарт Бет Супер лига / Mozzart Bet Super liga) for sponsorship reasons, is a Serbian professional league for football clubs.Īt the top of the Serbian football league system, it is the country's primary football competition.