Athletes who flout doping bans are generally thought to have gained an unfair advantage. In this paper, I critically examine this view. I begin by defending an effort-based account of desert in sport, explaining why it is preferable to the hybrid account that is favoured in the literature. Drawing on the effort-based account, I construct the Unfair Advantage Argument formally, in what I take to be its most plausible form. I then argue that the Unfair Advantage Argument should be rejected, (...) for two main reasons. First, I challenge its assumption that dopers have put in less effort than their opponents. Second, I explain why, even if dopers have put in less effort, they have still exerted a sufficient amount. Though doping is problematic from an institutional perspective, it is not – from a pre-institutional perspective – cause for moral concern. (shrink)