MEXICO CITY, Sept 24 (Reuters) - Guadalajara, Mexico's most popular club, were humbled by their smaller neighbours UAG as they went down to a 2-1 defeat on Sunday.
The loss against a side reduced to 10 men for the last 20 minutes was the latest poor result in an indifferent campaign by the Chivas, the only team in the championship who do not field foreigners.
UAG went ahead after two minutes when Argentine midfielder Daniel Luduena intercepted a pass in midfield and fed Francisco Bravo, who beat Oswaldo Sanchez with a right-foot shot.
The Tecos, who have taken only eight points from 10 games and are bottom of Group Two in the Apertura championship, went further ahead in the 20th minute.
Guadalajara, fourth in Group One with 13 points, lost concentration at a free kick and Argentine Carlos Casartelli headed home unmarked.
Omar Bravo pulled one back immediately after the re-start and Guadalajara had the ball in the net again shortly afterwards but it was disallowed because of a foul.
The Tecos held out despite having Luduena sent off in the 70th minute for a high tackle.
In other matches, Group One leaders Atlas (18 points) and Group Three leaders Toluca (21) played out a disappointing goalless draw in the weekend's top match.
In contrast, Morelia and Cruz Azul shared eight goals in a 4-4 draw.
Colombian Luis Gabriel Rey gave Morelia the lead after only 20 seconds but Cruz Azul hit back with two goals from Miguel Sabah and one from Salvador Carmona to lead 3-1 in less than quarter of an hour.
It was 3-3 by the 20th minute as Fernando Arce and Chilean Jose Luis Villanueva scored for Morelia before Carmona was sent off.
Villanueva put Morelia 4-3 ahead in the 37th minute and Sabah completed the scoring in the 49th minute with his third goal as Cruz Azul completed their sixth game without a win.
Atlante stayed top of Group Two by beating Queretaro 2-1 away while Mexico City pair America and UNAM were held 1-1 at home by Necaxa and Monterrey respectively.