Primera División de México

Now called Liga MX is a mexican professional league, also called Primera división (First división).

Competition system
In this league participate 18 teams, the first 8 places qualify to the quarter finals round, the survivor teams qualify to the semifinal round, the winners plays the great final.

The relegation is performed by percentage system, the points gained are divided by the played games, the team with the worst quotient is relegated to the league Ascenso MX