This paper examines the role of sport in determining attitudes and behavior in intergroup situations. The purpose is to suggest that participation in highly competitive sport encourages strong identification of fans with teams, which has important psychological implications for individuals and may foster negative sentiments toward outgroups. Manifestations of group consciousness in sport and the levels of antipathy described by Allport (1958) are discussed. Theories of conflict, categorization, and social competition form the basis of a discussion of some determinants of identification with sport teams, and implications for the physical education profession are drawn.