In this paper, we argue that there are important differences between playing and non-playing roles in sport. The relevance of sex differences poses genuine philosophical and ethical difficulties for feminism in the context of playing sport. In the case of non-playing roles in general, and officiating in particular, we argue that reference to essential differences between men and women is irrelevant. Officiating elite men?s football is not a role for which ?essential? (psychological and biological) differences are causally implicated neither in (...) competence nor excellence. Reference to such purported differences to justify the exclusion of women from roles such as officiating is unfounded and sexist. (shrink)