Feminist scholars have critically analyzed the effects of sex segregation in numerous social institutions, yet sex-segregated sport often remains unchallenged. Even critics of sex-segregated sport have tended to accept the merits of women-only teams at face value. In this article, we revisit this issue by examining the underlying assumptions supporting women’s and girls’ teams and explore how they perpetuate gender inequality. Specifically, we analyze the 14 U.S. court cases wherein adolescent boys have sought to play on girls’ teams in their (...) respective high schools. The courts’ decisions reveal taken-for-granted, essentialist assumptions about girls’ innate fragility and athletic inferiority. While the courts, policy makers, and many feminist scholars see maintaining teams for girls and women as a solution to the problem of boys’ and men’s dominance in sport, the logic supporting this form of segregation further entrenches notions of women’s inferiority. (shrink)