Guadalajara, who beat Monterrey 2-1 at home on Saturday, remained top of the standings two points ahead of Pumas and Cruz Azul, 2-1 winners over promoted Tijuana.
The America and Atlas players took the field at the Azteca carrying a banner saying "Together for a Mexico without violence" in reference to drugs-related violence that has swept across Mexico.
Saturday's match between Santos Laguna and Morelia in Torreon was suspended in the 40th minute with the score 0-0 when a gunfight broke out outside the stadium in the northern city when three vehicles with armed men failed to stop at a military checkpoint.
Winger Angel Reyna and Uruguayan Vicente Sanchez had given America a 2-1 lead following Honduran Georgie Welcome's early opener for Atlas.
Puebla went two up against Pumas in the opening half hour at the Cuauhtemoc stadium with a free-kick by Alan Zamora and a header from U.S. midfielder DaMarcus Beasley from Aldo Polo's right cross.
