In international football, the primary and most historic rival of the Portugal national team is neighboring Spain, with matches between the two Iberian nations known as the Iberian Derby, carrying deep cultural and sporting significance. Within domestic club football, the rivalries are intensely fierce among the Big Three—Benfica, Porto, and Sporting CP—where matches like O Clássico between Benfica and Porto or the Derby de Lisboa between Benfica and Sporting capture intense national attention and fierce emotional investment from fans.