High-flying Unam Pumas were held to a surprise goalless draw by Pachuca in the Mexican Clausura.

Unam Pumas, the Group C leaders, were reduced to ten men after 43 minutes when Juan Palencia was sent off and without him they failed to find a way past a team at the foot of Group B.

Yasser Corona scored the only goal of the game after 80 minutes as Puebla beat Necaxa 1-0.