UEFA is the organiser of two of the most prestigious competitions in international football: The UEFA European Championship and the UEFA Nations League. The main competition for men's national teams is the UEFA European Championship (also known as the Euro), started in 1958, with the first finals in 1960, and known as the European Nations Cup until 1964. The UEFA Nations League is the second tournament of UEFA and was introduced in 2018. The tournament largely replaced the international friendly matches previously played on the FIFA International Match Calendar. It will be played every two years.