The Big Three (Portuguese: Os Três Grandes) is the nickname of the three most successful sports clubs in Portugal. The football teams of Sport Lisboa e Benfica, Futebol Clube do Porto and Sporting Clube de Portugal have a great rivalry, and are usually the main contenders for the title. They share all but two of the Portuguese Football Championships ever played and generally end up sharing the top three positions. None of them have been relegated from the Primeira Liga either, having been participants in all editions since 1934–35 season; the lowest position any of them has earned is 7th, both Porto and Sporting, while Benfica's lowest position has been 6th.
The only two clubs outside the big three to have won the Portuguese league are Belenenses in the 1945-46 season and Boavista in the 2000-01 season. Today, the chief competitor of the three is SC Braga, which some consider a fourth member of the group now.
The three-way rivalry
Benfica vs. Porto
Benfica vs. Sporting
Porto vs. Sporting