2008–09 Liga Premier de Ascenso season
The 2008–09 Liga Premier de Ascenso season was split in two tournaments Apertura and Clausura. Liga Premier was the third-tier football league of Mexico. The season was played between 8 August 2008 and 31 May 2009. As of this season, the Segunda División de México was divided into different branches: the Liga Premier de Ascenso for the more developed teams that have aspirations for promotion to Liga de Ascenso and the Liga de Nuevos Talentos for those clubs with less infrastructure. Torneo Apertura. Inter–groups matches. In the Apertura 2008 and Clausura 2009  tournaments, the league determined the celebration of two weeks of matches between teams belonging to different groups. Torneo Clausura. In the final part of the Clausura 2009 tournament, the regular season and the start of the playoffs were affected by the 2009 swine flu pandemic, so some games were canceled and the coefficient of points/games played had to be used to determine the final positions of the classification table. In addition, some games were played behind closed doors, however, the season could end in the usual way. Inter–groups matches. In the Apertura 2008 and Clausura 2009 tournaments, the  league determined the celebration of two weeks of matches between teams belonging to different groups. Promotion Final. The Promotion Final is a series of matches played by the champions of the tournaments Apertura and Clausura, the game is played to determine the winning team of the promotion to Liga de Ascenso. The first leg was played on 27 May 2009, and the second leg was played on 30 May 2009.