Monterrey went top of the Mexican Apertura with a 2-1 win at home to Necaxa.
Chilean FIFA World Cup™ star Humberto Suazo broke the deadlock with a 12th-minute strike before Aldo De Nigris joined his strike partner on the scoresheet in the 26th.
Pablo Quatrocchi pulled one back in added time but it was too late as the home team leapfrogged Cruz Azul, who now have a game in hand.
Santos Laguna remain third after seeing off fourth-placed Toluca 2-0. Jose Cardenas and Christian Benitez scored the goals just before half-time.
Pachuca beat Atlante 3-1 away from home as Edgar Benitez scored a brace while San Luis won 1-0 at home to Tigres Monterrey.
