Football is the most popular sport in Egypt, and Cairo has a number of sporting teams that compete in national and regional leagues. The best known teams are Al Ahly, El Zamalek and Al-Ismaily. The annual match between Al Ahly and El Zamalek is one of the most watched sports events in Egypt as well as the African-Arab region. The teams form the major rivalry of Egyptian football, and are the first and the second champions in Africa and the Arab world. They play their home games at Cairo International Stadium or Naser Stadium, which is the second largest stadium in Egypt, as well as the largest in Cairo and one of the largest stadiums in the world.