Primera División de México(Mexican First Division)Clausura 2007 is a Mexican football tournament - one of two short tournaments that take up the entire year - to determine the champion(s) of Mexican football. It began on Friday, January 19, 2007, and ran until April 29, when the regular season ended. Tecos and Tigres inaugurated the season with a match in which Tecos won 2-1. Reigning champions Guadalajara were eliminated in semifinals by archrivals América and thus could not retain their title. Querétaro, who finished last in the percentage table, were relegated to Primera División A at the end of the season. On May 27, Pachuca defeated América 3-2 and became champions for the fifth time.
Salvador Carmona of Cruz Azul was charged of doping before his semifinal match against Pachuca. Regardless, Isaac Mizrahi, Cruz Azul's coach, illegally included Carmona in the starting lineup. For this, the FMF fined Cruz Azul a one-game suspension, thus disqualifying them from playing the semifinal's second leg. This means that Cruz Azul was prematurely eliminated from the playoffs, and that Pachuca were automatically qualified for the final.
The Court of Arbitration for Sport has imposed a much harsher punishment on Carmona: he is banned from playing any professional match anywhere in the world for life, thus ending his career early.