High Quality Content by WIKIPEDIA articles! The 2012–13 Atlas season is the 66th professional season of Mexico`s top-flight football league. The season is split into two tournaments—the Torneo Apertura and the Torneo Clausura—each with identical formats and each contested by the same eighteen teams. Atlas began their season on July 22, 2012 against UNAM, Atlas play their homes games on Saturdays at 9:00pm local time.