The aim of the article is the analysis of the principle of fair play which co-creates an axiological basis of contemporary sport as well as its basic moral category. The constituents of fair play are, first of all, responsibility and justice. Both values are central values, connected with each other, and also closely connected with other values inscribed in fair play, e.g. respect, solidarity, care or honesty. The conducted analysis shows that the rules of fair play connected with formal responsibility (...) and justice, i.e. following the rules and caring for the integrity of sport, are constituent for both sport and esports, whereas the rules of fair play connected with acting responsibly, i.e. respect and avoiding victory at all costs, are hard to realise in esports. It results from the fact that contact between the players is digitally mediated. Hence, apart from gestures and verbal communication, display of respect towards a player during a game is impeded, as is still more a spontaneous reaction to his or her being hurt. Also, avoiding winning at all costs is impeded in esports, as activities directed at obtaining victory are built into the content of the game and therefore should be carried out in accordance with the regulations, from the technical and tactical side and according to the possessed skills. However, it is possible to stop the game when the connection with the other player is suddenly interrupted. From a fair-play perspective also the content of some games employed in esports is questionable, as it assumes contesting moral rules, which in turn is at variance with the realisation of integrative, educational and formative functions of esports in society. (shrink)