Pumas UNAM and Tigres UANL shared the spoils of a six-goal thriller at the Estadio Olimpico Universitario.
Carlos Gonzalez powered Pumas into the lead after just seven minutes when a rebounded effort inside the box fell for the Paraguayan to smash into the back of the net.
In the 23rd minute, Eduardo Vargas took it upon himself to get his team back into this game, unleashing a fierce long distance shot past Alfredo Saldivar to level the score.
The Regiomontanos continued to pour forward, and moments later youngster Rafael Duran found himself on the end of a Javier Aquino cross to give Tigres the lead.