For every two games Monterrey played in the 2017-18 Mexican Big Six, it let in one goal. That usually will win a championship. In fact, Monterrey didn't lose a game in this top tier.
Monterrey showed how much defense matters in the 2017-18 Mexican inner pyramid, allowing only five goals in 10 games to win the first running of the Big Six.
No one else was even close to Monterrey, the only top division club across the world to go unbeaten. Monterrey finished with seven wins and three draws.
Toluca and Morelia finished in a tie on top of the Middle Six and are being promoted to the Big Six in 2018-19. Dropping from the top to the middle in their place are Guadalajara and Pachuca.
The Little Six produced a tight race, with Santos Laguna and Cruz Azul finishing ahead of Lobos BUAP for promotion.