The Covid-19 crisis had an impact on French professional and amateur sport with the suspension of competitions from 12th March 2020 and the premature and definitive closure of the 2019/20 season. This was the case for French men's professional rugby, for which the TOP 14 (1st division) and PRO D2 (2nd division) professional championships were suspended and then definitively closed. On 1st March 2020, the French National Rugby League (LNR) voted for a season without a championship winner or promoted and relegated teams, and with rankings stopped at day 17 for the TOP 14 and day 23 for the PRO D2. Based on academic work carried out on amateur football (Carin & Andreff, 2020) and professional basketball (Carin, Desquennes, Jaworski and Andreff, 2021), this study focuses on the economic models of French professional men's rugby clubs, their evolution over a period from 2008/09 to 2018/19 and the economic effects of the Covid-19 crisis on clubs’ finances. Access to the financial data of professional clubs in the first two divisions and exchanges with the Direction Nationale d'Aide au Contrôle de Gestion (DNACG) allowed us to better understand the distribution of revenues, expenses and financial performance before the Covid crisis and to assess the short-term economic effects of this crisis on the 2019/20 and 2020/21 seasons. In addition to the economic effects on the first two seasons of the Covid- 19, this study helps to highlight the crisis management of French professional rugby sports organisations.