MADRID, July 21 -- An estimated two million people pressed against barriers on Cibeles Avenue on Tuesday as Spain brought the FIFA World Cup trophy home through the center of a city that had been waiting three days to see it.

The parade through central Madrid drew a crowd the city estimated at two million, filling the Cibeles roundabout and stretching back along the tree-lined boulevard in a density that police had not seen since Spain last won the World Cup in 2010. Players rode open-top buses through streets hung with red and yellow, the trophy passed between hands, and 17-year-old Lamine Yamal, who grew up a few miles from the Nou Camp and is now the defining figure of Spanish football's next decade, sang along to Bad Bunny as the cit...