The Mexican National Antitrust Commission (CNA) has launched an investigation into possible monopolistic behavior within Mexican football. This probe focuses on the top-tier men's league, Liga MX, which has been operating as a closed league since the start of the Covid-19 pandemic. A closed league means that no new teams can join, and existing teams are not allowed to leave, which can limit competition and potentially create a monopoly. Liga MX is one of the most-watched football leagues in Latin America, with a large fan base and significant media coverage. The CNA is examining whether the league’s structure, especially during the pandemic, has led to anti-competitive practices that could harm players, clubs, or fans. The investigation may look into how the league is managed, whether there are barriers to entry for new teams, and if certain clubs have undue influence over the competition. The pandemic forced many sports leagues around the world to adopt closed formats to ensure safety and continuity. However, these temporary measures sometimes become permanent, raising concerns about long-term competition and fairness. The CNA is likely looking into whether Liga MX has maintained fair competition or if the closed structure has allowed certain clubs to dominate without facing the usual competitive pressures. This investigation comes amid growing interest in ensuring that sports leagues operate transparently and competitively. While the CNA has not yet made any formal accusations, the probe could lead to changes in how Liga MX is structured or regulated. The outcome of this investigation may have implications for other sports leagues in Mexico and beyond, as it could set a precedent for how antitrust laws apply to sports organizations.