It was as if we had beaten a country, not just a football team… Although we had said before the game that football had nothing to do with the Malvinas war, we knew they had killed a lot of Argentine boys there, killed them like little birds. And this was revenge. (Diego Maradona, 2007) I hope that people can understand that football is a sport, not war […] The past is the past. We must not put sport in the middle of politics. Chile and Argentina are brother countries, we have to show mutual respect […] If we stoop to aggression and violence, we lose that message of respect. Sport is about trying to be healthy and having fun, not a war. (Javier Mascherano, 2015) The epigraph shows two perspectives on one of the most popular sports in Latin America and the rest of the world. In this article, we test related ideas based on literature on collective rituals, national identity, and social identity theory. Specifically, we explore if international football matches can be understood as a type of nationalistic collective ritual that can lead to prejudice toward immigrants and legitimation of national social systems. National identification, outgroup prejudice, and legitimation of national social systems According to social identity theory (Tajfel, 1974; Brown, 2000), individuals develop their individual and social identity in reference to the groups to which they belong (i.e., ingroups) pursuing a positive self-concept. The specific content of that identity is built on comparison to other groups (i.e., outgroups), which usually results in a positive ingroup evaluation regardless objective assessment. A behavioral consequence of this process is the so-called ingroup bias (Tajfel, 1969). The study of social identities can be applied to different social categories, including national identities (Staerkle et al., 2010; Vargas-Salfate, Liu & Gil de Zúñiga, 2019). In this context, based on self-categorization theory (Turner, Brown & Tajfel, 1979), we can expect that when national identification is salient, members from different ingroups in a given society will be less motivated to engage in social comparison processes within that society, and more motivated to compare themselves towards other national outgroups. This focus will result in a positive characterization of the national ingroup over the outgroups because individuals pursue a positive collective self-concept. In that