[1] Porto and Sporting are based in the cities of Porto and Lisbon, respectively, and both compete in the Primeira Liga, the top tier of the Portuguese football league system.
In 1922, the first Campeonato de Portugal, the forerunner to today's Taça de Portugal, was decided in a best-of-three series between Porto and Sporting, ultimately won by Porto (the Algarve and Madeira FA winners were also scheduled to participate but could not attend the tournament due to logistical issues).
Thereafter, there have been five other finals between the two teams, this time after more participants had been eliminated.
The clubs have also met in the Primeira Liga continuously since 1934 and in other cup fixtures.
The comedy film O Leão da Estrela (1947) starring António Silva, a classic of the Portuguese cinema,[8] as well as its remake of 2015 starring Miguel Guilherme, revolve around the FC Porto–Sporting CP rivalry.